If he mailed them from Florida...how did they turn up all over the country without the stamps being canceled....and looks like not enough postage $0.49 X 8 = $3.95...only postage to go regular mail which takes a week.
Also since the crazy mail bomber a while back, the USPS has a strict surveillance scheme for suspicious packages.
Because the Post Office isn't filled with observant dedicated professionals? Which you would have agreed to until your conspiracy theory.
A crazed moron living in a van that can't build a functional device also can't calculate postage? Shocking.
Yes, which strongly suggest he was working alone.