Don't talk to strangers!
Today I’ve read about new bot, HoneyBot. It’s bot designed to use on IRC and Facebook chat. The way how it operates is both simple and clever. It enters the chat and starts chatting with two people (preferably with different sexes, it uses nickname analysis to distinguish it), then it passes text from one human to another, so there is no way that they would notice a bot, because they’re indeed talking with human being.