Woah, wait a second here. I am in no way calling you a dumbass, just including my own experience in working on these cars.
I test every wire before I interface with it and yes, it is a 'positive' trigger in a sense. However, a 5 wire system acts just like a positive trigger, except that the switch side needs to be isolated from the 12v pulse when you activate the trunk release. It very well could be a simple positive circuit.
All my information tells me its 5 wire, it acts like a 5-wire system when you test it, and in one case I've known that the BCM side seeing 12v fries the stock remote trunk release. How you choose to wire your car is fine with me. I work on other peoples cars for a living, and I can't afford to possibly mess up their car. So what is the extra hassle of hooking up one extra wire on a relay just to prevent any possible damage from occuring in the first place?
Don't get so defensive on a forum. We are all here to help and learn from each other. I am simply trying to voice my input on the subject. In no way was I trying to attack you or what you said.