Wow, what's a nice way to blackmail someone you want. Just get a list of those fake links, make a spoofer-trojan, or simply create a fake page/email that says: "you got a hallmark card", put some of those links there and send this to a person you hate (e.g. your boss LOL) and wait for 3... 2... 1... till he get basted!
Everything is getting easier in this world
P.S. Course I would never do something like that. But I'm the one who used to analyze all possible use of any tool/invention or known idea. And here I see a very big possibility for the ppl. who making their money on blackmail.