This is sort of a weird assumption to leap too. Would "People who like the page Black People" also be targeted? Would Republicans target people who are marked as "liberal"? Or maybe I'm overly optimistic about homophobic people being either dumb enough or unmotivated enough to do such a thing.
Heh, if anything, I'm more worried about it bringing back a resurgence of random messages from people who found me through the old search which allowed you to search by these characteristics. A less reputable part of me would find it interesting to find other people who share interests with me and are gay in my area... I'm currently in the Midwest with a limited number of dating options.