Well this is something you really should expect when playing with Unlimited On.
It's a trade off from not playing with Limited. This is also what ruined the Arsonist. Players using Unlimited and then abusing them when they were Clearly and emphatically stated they were meant to be used with Limits when designed.
But we do give you Options and Choices. Play tough (Limits On) or play relaxed (Unlimited). When you played relaxed (Unlimited) you will get exploits like this. If we nerf them for Unlimited usage then they become worthless for those that choose to play with Limits On. Can't have it both ways you know. You did choose the easy path my friend.