Nope, you should be fine, as long as you don't spam 'join my forum!!' everywhere. As you can see mumia has a link to a forum (not really about computers, but parts of it are)
I don't see why not, if you make a bad post you should get a warning (no insta bans or anything, unless you try to post links to free ipods and stuff). As long as you don't repeatedly violate the rules or post off topic all the time you wont have a problem.