It is very disappointing but I am not exactly sure why Telegram should be held accountable. I understand Telegram facilitates this behaviour, but I think we should be prosecuting the offenders.

You can also print and mail (physically) revenge porn pictures of your ex-girlfriend to their parents and coworkers. Does that mean your country's postal system should open and inspect every single letter they handle? Not only this is a gross violation of privacy, but this is also logistically unfeasible. UK's Royal Mail would probably have to hire 20 times its current workforce, and they would still face significant delays.

But again, I am 100% for putting the people who share revenge porn in jail. There is no excuse for exposing someone's naked body without their consent to strangers.