So, apparently Facebook are launching their own email service. Here’s a writeup on it from the very lovely Keri Honea. Go read it and support her work. Then come back. I’ll wait. I’ll even stay open in this tab while you go and read it.

Okay. Here’s the thing. Facebook is so prevalent in modern online life, so splattered all over pretty much everything we do on the Internet, that setting up an email service probably makes sense for them. After all, there’s a bunch of people who already spend a considerable amount of time on the site each day, and not all of them play Farmville, even. So why not incorporate their email into it, too?

Now, granted, few of us have had the chance to test out the new features yet. And there are a few neat ideas in there, like the filtering options, which are apparently pretty cool. But the thing that will give some people—particularly the more net-savvy amongst us—pause is Facebook’s rapidly-eroding reputation for personal privacy violations.

There are all sorts of responses to this. No, you shouldn’t post things on there that you’re not happy to share with the world—just like any website. But you don’t always have complete control over everything you appear in. The tagging process, while cool in principle, is open to all sorts of abuse and has been the source of many arguments I’ve heard in the street. This is something which wouldn’t have happened five years ago.

And then there’s the controversy over exactly how “personal” your personal information remains, even with all your privacy settings jacked up to the max. Sure, you may be able to lock off your wall, photos, messages and all manner of other things from prying eyes. Everyone, that is, except for advertisers. Those supposedly “targeted” ads on Facebook that get everywhere—what will happen once email, an inherently more private form of communication, enters the picture? Will we start seeing targeted ads on Facebook based on your emails?

Yeah, GMail does this already. But at least GMail’s ads are non-obtrusive, limiting themselves to simple text links that are at least relevant to the message you’re reading at the time. But imagine, just hypothetically speaking of course, that you sign yourself up to a particular kind of site that you don’t really want to talk to other people about. It could be a dating site. It could be a porn site. It could be a forum specialising in some sort of obscure fetish which only you and a gentleman from Bulgaria frequent. But the advertisers spot this, and so the ad campaigns begin.

This isn’t a problem until you decide to show someone who’s popped over for coffee this hilarious new link you posted earlier today. You click over onto your profile and BOOM! Ads for tortoise porn. Or something.

Okay, it’s a bit of a kneejerk reaction, of course, and Facebook themselves claim that they’re not intending to be a competitor to the big boys of the webmail arena. But given the huge number of Facebook subscribers, it’s not unreasonable to assume that a goodly proportion of those people will happily opt-in without checking the terms and conditions thoroughly. Which, as many people have been finding out, is becoming more and more important to do.

I remember joining Facebook a good few years back. It was a relatively small community that was kept private to your close group of specifically-allowed friends. It was a good place to post photos and private-ish messages, and a complete contrast to the other big-hitter at the time, MySpace. Nowadays, though? Facebook is something of a running joke to long-standing users of the Internet, many of whom have either switched completely to Twitter, or only use Facebook when dealing with people who don’t understand Twitter.

Trends change over time, and it’s possible that Facebook will eventually fall from grace completely when the next Greatest Thing Ever comes along. What will happen to those petabytes of data they’re storing about everyone then? Including, now, super-private emails? You can guarantee that not everyone will remember to delete their accounts and remove any incriminating “evidence” from there.

Simple solution: scale back on your Facebook use and find alternatives. I barely use Facebook these days. I’m a Twitter man primarily, and am slowly creeping around to using GMail as my email client of choice. Can’t argue with perfection.

In short: if you email me anything @facebook.com, I probably won’t be reading it, because I’ll assume anything that comes to that address will be something to do with Farmville. I am yet to hear anyone in my group of friends say something positive about the prospect of having a Facebook email address. Why not be the first? Convince me why it’s a good idea in the comments!

Or, you know, don’t. Your choice, really.

Free bonus: What Your Email Address Says About You, from The Oatmeal