I've been to a LOT of forums in my day. Long story short, nobody reads the stickies.
Short story long, people who are new to a forum don't read the stickies. They don't read the FAQs, the gigantic red flashing "READ THIS BEFORE POSTING" links, the front page of the wiki, nothing. The first six topics of the forum could be spelling out exactly what they have to say, they'll still make a new topic about something that's been argued into the ground a hundred times before. When you boil down the population of a game-centered forum, you get three basic groups:
1. People who like the game. These people won't hang around the suggestion or bug reporting forums, because it gets their hopes up. They'd rather just enjoy what they have and support the developers in other ways, be it writing fanfic, publicizing their favorite indie game, donating to the cause, what have you.
2. People who don't like the game. These people will hang out in the suggestion and bug reporting forums perpetually whining about how their particular pet peeve hasn't been fixed yet. Usually because their peeve is either unsolvable (inexperienced players "ruining" the game, a core mechanic they disagree with, etc.) or infeasible (multithreading support for pathfinding, make the game an MMO, make the game a Facebook app, etc.). The stickies won't stop these folks either, because they believe their opinion is worth more than that of the people who do the heavy lifting.
3. People who are new at the game. These people don't hang around anywhere in particular, they just click something that seems like it's relevant to what they want and post a question in full earnestness. The fact that their question has been asked and answered a hundred times is lost on them, because they don't know WHERE the faq even is. They don't know the wiki exists.
Basically, stuff like this is like foul weather. You can either stand in the rain and scream at the heavens, or grit your teeth and bear it. Nothing you can do short of genocide on a heretofore unimaginable scale is going to stop it. And even then, it'll just be a delaying action. People will stop voting for improved health care because there's nobody voting on anything because they're too busy scavenging for canned food.