The only law rpietila seems to have broken - is the evil Jante law, created by jealous females.
rpietila have another thread on Bitcointalk called
rpietila Wall Observer - the Quality TA Thread ;)
I for one love to read it, because it brings out more well thought out post by traders, speculators and analysts.
The same has been the case for rpietila Altcoin Observer, usually there is good discussion going.
To be honest, I don't see rpietila deleting that much either. And hey, why are people writing in his threads if they don't enjoy it? It is your option to read, with or without moderation. There is a mirror of Bitcointalk where you can read deleted posts in self moderated threads, so this is a non existing problem.
Don't take the trolls personal, they are jealous of your wealth and nothing else.