I would if I got deliveries often.
I also can say I work for UPS and while we don't get gifts or tips often we do like it when it does. This past Friday one of our customers gave me a tin of butter cookies... nom nom nom they're almost gone haha. it may be our job, but let me tell ya, our job aint easy. lots of walking, sometimes packages are heavy plus we have to be quick AND safe.
you might also notice UPS at least, when they leave packages they try to leave them hidden from street view. not always possible but if you have like a pillar or something we will stick it behind the pillar so it can't be seen from the street, less chance of being stolen.