(adsbygoogle = window.adsbygoogle || []).push({}); Well I Was Thinking ( Weird I know... ) And if you can do the negative prestige token glitch, then you should be able to do a negative unlock tokens glitch, So This is a theory, But at the same time i'm 90% Sure It'd Work. So Can Someone Try it out and tell me if possible!

Steps:
[1] Have a Unlock Token For a Killstreak
[2] Have a friend host a game.
[3] Go to the Killstreak Menu of your choice ( Assault, Support ) and pick any item and hover over no.
[4] Have your friend search for a game and back out immediately.
[5] Now with the pop-up still there go to the Killstreak menu and click the killstreak, another pop-up should come up press yes.
[6] Then press yes again to the second pop-up, you should have -1 unlock tokens.

[EDIT: DOES NOT WORK ]

Your welcome. It was good idea though, thought it would work too.