I think the original article is fairly general and does not imply doorstep proselytising. If legislation was passed, and was applied to JWs, they would fairly bask in the glow of the self-justifying "persecution".
They are obsessed with knocking on doors, so they would really see being asked to desist from pestering people in their own homes as a curtailment of their "preaching". I was told that years ago, there would be a door in a doorframe stood on the platform for demonstrations.