There's always spammers, because there's not enough admins on.
ADMIN TIP:
Whenever you have bad lag, and that little green image starts to beep, press Ctrl A, and look at the list of people. First, start warping to the people whose names you do not recognize, and check to see if they're spamming or using a lag mover. Next, warp to the people whose names you do recognize, and check for spamming or even a simple but laggy mover. Works effectively.