Change username to user ID.

[HaXzz Banned Posts:293 Threads:19 Reputation 17]

This would make it easier for the admins to track down the scammers.
What happens if the Skype is compromised?

Admins can already find user id's easily and we can also see login information and past usernames so this is not something that the forum needs

[explain Tense Posts:755 Threads:87 Reputation 46]

You can check the user's namechange history though.