Signatures are completely pointless. Literally draw squiggles as anyone else can. Nobody ever checks or compares them to the original, how can they?

It's to prevent theft by the delivery person or by the wrong recipient

Sometimes I wonder if true reason behind them is not any sort of verification but to maybe increase potential punishment if caught... So effectively nothing...

Signatures are terrible, and especially it's hard to automatically confirm they're correct even if you have a sample on file.