Does regulating them will change the fact that those signal providers are crap?
Instead, people should just ignore those signal groups. These groups are mostly not consistent and they are just doing that service to milk some money.
This won't happen as this is not possible in real scenario. These groups can disappear without a warning.
Most of them are doing such activity to enrich themselves and screw gullible users.
So regulating them is not an option. It now lies on the users how they will use these trading signal groups to their advantage.
But in my opinion, better do your own trading rather than rely on these groups. I haven't seen any decent group that will truly help the traders.