Yes they do, at least they did in pre eoc im pretty sure. I remember someone posted on the **** forums his botting achievements and he forgot to block out his name, and he got perm banned few hours later and on the ban it said something like this: "Next time you brag on a botting forum, make sure you hide your ingame name". Im quite confident that it was real. They also monitor sythe as I know few people who got perm banned for trying to sell their accounts and not blocking their in game name.