It's not illegal to track law enforcement, but if any of their still visible chats show intent it will hurt them. They'll also want to find out how many people in the group chat are outside of the US, if any money was being exchanged, etc. Hopefully they can unwind these groups, because it's just pitting people against law enforcement who have no idea what they're up against. They don't seem to have a sense for when…
At least, while decrying civil disobedience, you differ from the administration in one important aspect: You think there should be accountability for police shootings. That's different than the ICE leader, the DHS leader, the FBI director and the Vice President.