Being booted off isn't the problem, it's the fact the destination teleporter is capable of imediately sending the player back.
Imagine this: A griever placing a redstone torch and some redstone next to a teleporter so that it is permenently active. Anyone who arrives to that teleporter will be ported back and forth, thus causing a 'speed hack' disconnection'.
Is it possible for the destination teleporter to have some sort of immunity against teleporting the player away for a few seconds?