How would they commit suicide? Leave a note on Twitter saying "I will kill myself now" and then that's proof? Would be hard to have anyone remotely believe it's real people if none of them can be confirmed dead irl. Also, thousands of "accounts" doing this over the course of one weekend will look very suspicious, given the fact that the public is aware of the bots on Twitter now. Your theory is unique yet very unlikely. Suicide weekend sounds more like an out for evil bastards once they get definitively caught, since it sounds like it would be triggered by a specific event (arrest of a big name crook or similar).