I dont know bout that,last time a user Japa was posting some important/useful technical details and i couldn't find his thread when i needed.I think someone in staff does not likes excess technical stuff.
Japa was just dumping links and other data. It was hardly usefull at the end, hence the thread was deleted. AFAIK they are banned.
@Jet Cash: comments about where a thread should be or that its against the rules can be see as "offtopic to the thread" which would allow mods to remove those posts. I tend to just report the thread/post in question and unwatch it (or dont watch it in the first place).
Humour is indeed difficult in an online environment and sometimes jokes get removed. I wouldnt bother about that too much unless you have posts removed constantly or in high numbers.