This isn't a "sledgehammer" approach. The operators made an explicit choice to stick a bunch of mailing lists and websites on the same machine as a remailer. A reasonable person would expect the remailer to eventually be used to commit a crime.
It's like keeping your kids school books and a kilo of cocaine both in your cars trunk, then complaining when the FBI takes the whole car into evidence.
Its more like a commercial airplane being seized because one of the passengers smuggled drugs. I think its reasonable to assume that during the life of a commercial plane, a passenger will eventually commit a felony(smuggling drugs/contraband) on it.
Whoah whoah whoah! Is a remailer really === a kilo of cocaine? Seems like it's more like a car sans license plates, operating in a state where license plates are optional. (But hey, if you use that car to transport a cool k...)
Sure. Because you have no idea if that remailer is going to be used to leak information on civil rights abuses or to plan the assassination of an official.
I run a number of Tor nodes. I follow the Tor mailing list. I understand that what I am doing is not illegal, but is still very risky. What have I done in response to that risk? All my important shit is hosted elsewhere.