I'd rather my govt actually charge them with an actual crime or let them be. This harassment might be amusing turned against the WBC, but won't be so amusing when used against Tea Partiers, 2nd Amendment supporters, and the like.
Don't get me wrong, I don't like them at all, but like we've learned with the Patriot Act, RICO, and any number of seemingly innocuous laws and actions, they can always be misused. Stick to the laws and Constitution, do it correctly.
Chris