And I've been waiting for an opportunity to pass this on, because I love the meta-memage, but I'm too literal to post it unless it actually applies. But the 'crush' meme (you know the one I mean; I'm not doing them the favour of linking) is the perfect excuse.
The security aspect is completely blah as far as I'm concerned. Yes, they may be trying to steal your password and / or sell your information. No, they have no means of verifying that the person who signed up is who they say they are. None of these things is a cause for hysteria as far as I'm concerned. If you think someone might misuse information, well, don't give them the information, then. Duh.
But even assuming the meme is completely honest, it's annoying. How about we behave like adults and tell people if we fancy them, while being prepared to handle it if our feelings are not reciprocated? Is that so hard to grasp? How about we don't engage in stupid contests to see who's the most fanciable, or stupid primary school style giggling and insinuation about people being attracted to eachother?
If you want to know, I am attracted to precisely two people on my friends list, and they both know how I feel. One of them is lethargic_man, my boyfriend of two years standing (I mean, can you even handle the excitement?) and the other knows exactly why nothing is going to happen between us, the existing commitment being one major reason. There are also two of my exes here; they haven't got any less attractive since we split up, but they are definitely not in the potential partners category. Also not exactly world-shaking news.
Then there are lots of people I consider in principle attractive but whom I'm not interested in personally. And a largely overlapping set of people that I could potentially be attracted to in the right circumstances and if they expressed interest in me. There is absolutely no-one who would offend me by being attracted to me, and there is absolutely no-one (apart from the aforementioned boyfriend) I would be in the least interested in pursuing any kind of sexual interaction with.
Since we are all sensible adults, we can make better uses of our time and energy than behaving like idiots who would be despicable to a class of twelve-year-olds. For example, we could be reading and thinking about greengolux's really interesting post about the intersection between sex, friendship and love and the way they are perceived in society and how slash fiction plays into the equation. Now that's the kind of thing that I'm happy to see on my friends page!