Also, I managed not to snort coffee out of my nose when I saw that.
Computer programs are brilliantly stupid. They do exactly what they're designed to do, no more and no less. By FB's estimation, we're an excellent match: plenty of friends in common, very likely to know each other already. FB has no way of evaluating when its suggestions might be really freakin' awkward.
To be fair, I'm not especially bothered. We parted on relatively good terms, at least in the context of, y'know, a divorce. But let's face it: I'm not going to try to friend my Supposed Former Wife. For anyone who doesn't already understand why, well... I don't think I can express it any better than this:
Warning: Not safe for work, obviously - kinda harsh language.