This is one of those rare occasions where I agree with the ACLU.
People need to be able to protect themselves, at least with electronic recording devices.
This would put everybody on notice that what you do may be recorded, so be nice.
For the police, it means do only what you must.
Rather like a PC version of the old “An Armed Society is a Polite Society” model...
It’s well past time for the elitists to understand that they work for us...all of ‘em.