I've received 3 or 4 FF's directly from the maker in the past several months, all USPS Priority mail with no signature required; and I really appreciate that kind of service.
Just this week I received two knives (not from FF), both USPS Priority with signature required. Since our postal delivery person will not come to the house -community mail box- this meant I got a pink slip in my mail, had to wait a day, then drive to the PO clear at the other end of town, stand in line behind all the Christmas shippers, before finally getting my package.
I don't ship signature required, and wish others would do the same; insured, yes --signature required, no!
Rich