And for the record, nobody has busted this forum yet, the action to which you refer happened to the Original Guitar Nuts Forum, as was once hosted by John Atchley (at guitarnuts2.proboards.com/page/gn1-pages). RandomHero started this forum when JohnA confessed that he didn't have the time to keep the script-kiddies from junking his forum at will. All praise to RandomHero!
The point of a 31 day no-post period applies only to those who have never posted at all - that excludes you, my friend. ;D But in general, yes, a former member can sign up (again) and he or she will be welcomed back into the fold as if they'd never left. The only reason to keep a tighter rein on non-participants is to render the Search function once again, functional, it's nothing personal.
See ya in the discussion arena!
Rule #1: All Lives Are Final. Make sure that the life you have just been issued is appropriate for your needs, before departing the womb.
Rule #2: In case you don't like the life you have, see Rule #1.