I think that the intention is to seize your color laser printer and use it and its serial number against you in court as gathered evidence.

Of course, filling out your warrant-y card could help the process if you'd gotten rid of your printer after the crime. But then again, you'd have to be pretty stupid to leave a paper trail back to you by using a credit card to buy the printer, filling out the warrant-y card, and keeping the evidence (your printer) around.

It kind of reminds me of how they caught the first World Trade Center bombers in the early nineties. The idiot actually went back to the rental place to get his money back for the "stolen" moving van they used as the bomb. As Napoleon Dynamite would say, "Freakin' idiot!"