Years ago my local UPS delivery driver was killed by unmarked and illegally shipped hazmat items that reacted to high heat inside the big brown truck he was driving. He left behind a wife and three kids. Shipping rules are in place to protect others. Put yourself in his family's shoes.
and the big brown truck drivers handles haz mat packages differently, do they have a air conddition blast box in there truck. there air condition is the doors open, have you ever seen USP unload trucks at night with has haz mat packages on them? I have, so if that package was marked haz mat he wouldn't have been killed