No, the irregulars can't just teleport ANYWHERE, at least, without tools of their own. They can't, for instance, teleport from the first to the 134th floor on their own power, and there are some locations within the tower not even Jahad can access, unless under certain conditions, such as floors with no admin. Admins are still king, and if they don't interfere, the battles themselves aren't enough for them to bat an eyelid. They cannot access the climbing portion of the tower, the hell train, and a number of other places. Bam has been traveling well outside the standard parts of these floors since the floor of tests, though not on his own since the hidden floor. FH are absolute to almost all of the tower, but there are still anomalies outside irregulars themselves, & irregulars are NOT equal to each other. Jahad could kill all of his former friends (as he did on the hidden floor, except the one too fast to catch) if not for the admin contracts, and with the exception of Enryu & Phantaminum, the admins are still the hidden enforcers of the tower's laws & order, even if some of those laws were "created" by Jahad & the FH.