Mage spell Blink=kick?

[Wolverine77]

Had someone on my server say they used Blink and got kicked from server for speed hacking. i have seen this before. how do i fix it with out disabling anti hack on my server?

[Babbaa]

Don't use blink!
(filler)

[kreegoth]

I tried making an LUA that used blink but the NPC wouldnt even do it. So im thinking its best just not to use Blink til it gets altered somehow

[Dythzer]

Get an emulator with better anticheat system.

[*Scripted*]

or fix it?