There's going to be a huge debate about internet censorship if ever they fine signature campaign participants, they first have to prosecute and fine the domain registrar and the host hosting Chipmixer, and Google for indexing Chipmixer and everything related to why Chipmixer is online.
I don't know if there's a past ruling about liability being a third party on a site considered by US Justice Department and FBI as an offensive platform, but first, they have to prosecute and render a decision on Chipmixer before they will have long deliberation on internet marketing, which will involve internet giants like Facebook, Google and everything associated to the internet.
It is highly unlikely any law enforcement agency in the US will go after Google (or any other US based tech giant) in any capacity unless it involved any competition laws or tax evasion.
I think this puts to rest those conspiracy theories about Chipmixer being a honeypot operated by government agencies.
Yes it does but if I recall correctly those conspiracy theories were not the majority view, they were far and few.
I doubt this will affect regular users but there is a possibility they could try to shut down this forum. There is already a similar precedent when Deep Dot Web was seized by the FBI. It would be an overreach for them to go this route but if they really wanted to shut down BitcoinTalk this would be their best opportunity. As far as I'm aware Chipmixer didn't advertise anywhere else besides this forum.
I never contemplated a scenario before where this forum could be viewed as a problem by any governmental agency but now that you mention it, would it really be a surprise if they seized the domain and shut down the forum?