This is not about the signature campaign per se, but the project posted in this forum. If the project broke the US laws, I'm pretty sure the thread would the removed and the user data might be shared with third party.

Ross Ulbricht aka Silk Road CEO was a big case before and Ross Ulbricht use this forum to promote his project. Currently Ross Ulbricht is still in jail, if the US regulator is taking serious, this forum should get shut down at that time. But this forum is still exist, this mean an illegal project is still not enough to get shut down, maybe until Bitcoin is completely illegal in US.