Anti Idle Shutdown device, how much trouble?

Ok I have a question but here's the deal. I didn't disabled the Auto Idle Shutdown but was able to work around it and made a device to let my truck idle for as long as I want. No high RPMs, no brakes released or anything like that.
My question is: How much trouble can it cause? I know about some states not allowing Idling with fines but, what could happen if the lease company finds out about this little hack?

 

I forgot to mention: The reason I use it is because I want the truck to warm up a little while I do my pre-trip and before getting out my personal car in the mornings. Also, at very cold outside temperatures it doesn't take long to freeze to death while taking a long nap. Sometimes I have to wait up to 3 hrs to get released from some of my stops.

 

Well I think that's for my company to decide but when I mentioned to my supervisor he said that he could care less as long as it doesn't screw something up on the truck.

 

Thanks Lowa3468 I didn't know about the needed high RPMs for the engine, the very longest I have to wait once in a while is 2-3 hrs and the minimum 1/2 hr. I have tried the Cruise Control trick but still shuts off. I don't have APU since I'm home every day.