Yeah. You'd think they'd have sensible names, like all the other users on the site.
The only advantage of a such name is uniqueness (more precisely, a google-wide uniqueness), but why exactly is that an advantage?
Perhaps to make it easier to track which sites were successfully attacked? For example 100 000 websites under attack, 100 000 silly user names; a month later an automated google search reveals which websites are insecure, and those are selected for a second wave of attack? For example, to avoid Google penalty for getting 100 000 links on the same day, the spammer could create accounts on 100 000 websites the same day, but only ad...
If it's worth saying, but not worth its own post, even in Discussion, it goes here.