I have had someone try to get in my truck only once and it wasn't a customer.I was having a really bad day about 2 months ago and I was delivering to one of my favorite customers. As it turns out the customers UPS acct rep was there. He could see I was having a bad morning and came onto the truck after identifiying himself. It took me about 3 seconds longer than it should have to chase him out. I told him "I don't know you, you need to get out of my truck" He said again he was so and so. I said "I don't see any ID, get out". The alarms went off in my head when he stepped into the back, which was further than he should have ever gotten. He got off the truck and I never heard anything more about it.