The fact that it is altered to not be ear damaging, isn’t that a good reason to make the rule be to ask people to put suppressors on their guns when target practicing? Think about it. If I was living out in rural PA, and you wanted to practice shooting in your yard? Wouldn’t you want to lessen whatever was audible to me say, a ways down the road, for courtesy’s sake. I would!
I supposed that could be a secondary concern, I'd do it so I could shoot without ears. After that range time, the lure of multiple suppressors has been compelling with the paperwork requirements and tax payments being the showstoppers.
make the rule be to ask people to put suppressors on their guns when target practicing
Can't see them as a requirement until paperwork and tax removed to make them more accessible. OTOH, in the country where it is legal to shoot, I wouldn't restrict shooting for noise.