If you put something like that in, then what will happen is that any lfg channel will largely be silent. An ooc channel will still have traffic, but much less because people won't be in it to advance their character (to lfg), so they'll exit the channel.
This is about the dumbest set of assumptions I've ever seen. Thanks Zaven for pointing it out again.
Unless you've got some sort of insider research going on, Dumar, I'm calling bullshit.
I could just as easily say a LFG window lets people advertise they're lfg without having to worry about spamming a LFG channel, so they're then freed up to spend MORE time in ooc, and with better socializing because they AREN'T just focused on trying to spam the fucking ooc channel like some idiot trying to 'advance their character' in a chat channel that isn't designed for that anyway. The result is a MORE interactive world, and with deeper interaction, all because designers realized a lfg window would help people advertise/gather information on who is lfg, so those players could interact in ways deeper and more socially binding than just spamming a lfg channel AND EVERY OTHER FUCKING CHANNEL TOO with lfg spam.
LFG tool in Vanguard was awesome (when there was a population). You'd turn on your LFG tag, maybe even what dungeon (or quest?) you were hoping to run, and then not have to make it a full time job spamming every channel with the fact you're LFG. You could go solo, or craft, or just chat with people, and other people who weren't channel spamming fucking morons would see you were lfg, where, what class you were, etc, and, get this, send you a fucking tell asking if you wanted to join.
And if you were IN a group, you could, get this, no, really, get this, you could PLAY THE FUCKING GAME instead of having to spam that you were LFM and send tells to a bunch of spamming fucking idiots like your job is suddenly to not be a member of a group and instead be the Millionaire Matchmaker interviewing a bunch of flakes to see if one of them fits the group. You just put that your group was lfm and keep playing the fucking game and let intelligent people who can read send you a tell if they were right for the group.
In short, only retards who like spamming LFG in every chat channel think spamming LFG in every chat channel is high quality social interaction that should be kept. I'd prefer a system where there was a good LFG tool providing information for people smart enough to find it, comprehend it, and then act on it. The best part is then, when you do see someone spamming LFG for like 20 minutes, they might finally resort to using the LFG tool, and you can tell them to fuck off because they're obviously an idiot because they couldn't pass the first, basic test of how to be a good player in a group based game.