Castration would be no good, because in order to castrate someone's genitals, you need to be able to find them first. Which is a problem when dealing with people with small penis syndrome. Perhaps instead of a penile implant, they could have an automobile gear shift grafted onto the end of their small penis.
There's a new gadget out this year that attaches to your spokes and displays programmable patterns using LED lights as it spins. Too bad there isn't enough room to spell out choice words to motorists with small penis syndrome....