Meh, I'm happy letting friends borrow our truck. That's one favour in the bank!
But then again, our truck is used for, you know, actual truckly duties! So if a buddy wants to borrow it to move some furniture, or head to the landfill, or pick up some gravel - that's what it's meant for. If it was a 60K cowboy cadillac with a pristine interior, maybe I'd have a different opinion.