From the other side of the pond:
I believe the amount of reaction should reflect the amount people care about the issue. I also believe that once this law is adopted, it will be too late to do much so it's important to let those in positions to do something know exactly how much you do care.

As to the bit about enforcement being taken to what seems like silly extremes, sessions weren't a target until recently, were they? People probably would have once thought calling a session 'entertainment' and applying the two-in-a-bar rules to self entertainment would never happen. It would be silly. If the possibility is there, some vindictive or literal-thinking soul will take advantage of it. What's to prevent someone being fined or arrested because a disgruntled person complains and the authorities have no choice but to enforce the law because it's the law. It seems to me if they're supposed to be fixing the law so it makes more sense they should just try to get it right.

My personal opinion is that PELs are silly PERIOD. License what people do to have fun? I can't see how entertainment has anything to do with safety, noise, or any of the other excuses used to justify it. One would presume these things are covered under other appropriate laws. To me, it seems like PELs are necessary because they make someone money and it would look bad if the government scrapped them completely. They'd be admitting none of this enforcement and debate has been valid.

Please forgive me if I've messed up any terminology. I'm not used to speaking British.