It also prevents learning. On my FinShaggy account I had tons of newbs thank me because I was the only one that would answer right away, while all the old schoolers bitched at me for being present too often.
So it is give and take.
You also know that ban evasion results in more bans right?
I didn't evade a ban, a robot did it, not a mod. And I didn't know that I wasn't allowed to PM people telling them about writing for Devcoins. I was just trying to PM people in the noob section to teach them, and I didn't even get a chance to appeal the ban. It wouldn't let me back on the site to email a mod or anything for an appeal, so I made a new account when I moved. I no longer PM hardly at all, I am currently in a discussion with 1 person via PM and nothing more.