Its true but I rather wondered if they would be prosecuted at a higher level of activity. For example, due to unpaid taxes due to this reception or due to misleading advertising ....
Could the police detect ip addresses of the operators of these groups and do criminal proceedings?
Telegram is a very vulnerable medium for scam nowadays. Scammers might be very difficult to prosecute if detected, I also think you need more experience to manage information in each forum that involve exchange of coin. You need to do your research on every information and if you dont get good answer you might browse related information on the forum or start new if you can find any .