I never use Facebook chat. I find the thing obsolete. Whenever I'm (accidently) on it, the only people that harass me are people I haven't talked to in ages and have not wanted to talk to in ages. So, it's some kind of artificial small talk that neither of us are really into. Some people just seem to have this compulsion to chat to anyone on Chat. Fuck off, we've nothing to talk about.
To be honest, for the most part, I have a problem with all MSN/Chat clients. The idea is obviously to simulate a conversation but it feels so artificial and fake it just doesn't work for me. I prefer hearing the person's voice and usually seeing them. Even phonecalls are better, there's something so impersonal about chatting online.
If the person really needs to talk to me, they use PMs. That is a far better experience for me as all it tries to simulate is emails, which are nothing like a real conversation. Works perfectly for me.
The big problem I has with the new chat is people getting confused and sending me chat messages even though I'm offline. But people seem to have copped on so really, I no longer give a fuck