Can you just shutdown your nodes or can they force you to continue? Best practice for relay operators is to just stop the operation altogether if the authorities force you to attack the users.
They could probably compel you to continue, or forcibly take over the node. Once you're in NSL "we can do anything we want and you can't tell anyone about it" land, being prevented from shutting down your own business or service isn't terribly far-fetched.
This seems obvious but it is a constitutional right that has been cited as a reason to not comply with extra-judicial pressure to assist the government with an investigation.
This is why some projects do not accept donations and have a canary.
Had the authors of Truecrypt been paid, they could had been compelled to modify their source code to the government's will.
By not accepting payment, they are protecting themselves.