Additionally, the implicit threat of having your paid membership revoked for bad behavior can provide a natural check.
Something Awful has used this to great effect to keep trolls in line. I wonder what % of their membership revenue comes from banned users purchasing new accounts.
I'd say most of it, at this point. As a long-time goon, getting banned and rereging the account is a way of patronage. No joke, it's very common behaviour there.
