Not only is something like this easily abused, it's totally unneccesary.
If you're successful enough of a crafter to have tons of money for bounties, then you should have no problem joining a good guild. A PvP server is not the place to be a solo, guildless, player. All the guilds need good, productive crafters, and should also protect their crafters. If this isn't happening, you're in the wrong guild.
When someone ganks me, I send the name out over guild chat. Then the hunt is on.