True there can be no
True there can be no compromise by the nature of the issue. Every decibel represents someone's greater freedom or greater torture. Also true, criminal enforcement with tech (beyond reasonable doubt) is unachievable. But civil enforcement (which could - but usually doesn't have even traffic consequences (noted above)) is possible just on officer testimony and experience (predominance of evidence). So, the RPM'ers are not ultimately safe from the SLEEPers. Not bashing cops here, but it is clear that they could make an impact in many urban/suburban areas where loud roads are well known - they choose not to or are directed to other more important details than non-traffic civil violations. (In FLA the judges can do $1000/pop, but enforcing that? We're going to need that too to get attention and compliance.)
This is a willingly plague infested country. Asking for quiet seems so quaint.