if he is a problem and derailing threads put him on ignore.
I don't see how putting him on ignore is gonna stop him from derailing threads. unless everyone puts him on ignore, and then if the whole site has him on ignore... yeah...
for the record I'm not saying he should be flat-out banned or whatever. but maybe a warning/suspension. for that matter, a lot of people here have said how they feel about his constant posting, but it doesn't seem to slow him down at all. for a poster that thinks of himself as being so 'positive' or whatever, that seems rather disrespectful. it's like when white posters are told many times people aren't cool with them dropping the n-bomb, and then they keep doing it