#0 - July 6, 2010, 7:57 p.m.
It could be an alias, or a single, permanent number, whatever.
So if my realid is Micah Whipple (sorry lol I like that name), I could attach another name, like Ferdinand Archibald, that will appear when I post. Or I could use 49763029.
If the intent is to reduce forum trolls hiding behind an endless succession of level 1 alts, then it can be anything, a new name, a number, whatever. Its completely unecessary to make it a real, actual name. Anything else will work just as well.
Of course, if the intent isnt to clean up the forums, but something more sinister, then we have a bigger problem.