I think you misunderstand it. Reading the post of above user, as per my understanding is that he is getting muted because he answer someone who asked his telegram username with something like "same with my username (high possibility his stake's username)" which is something against the rules if I remember it correctly.
Correct and according to the chat rules he probably broke rule number 4. Here's a quote about the said rule.
4) No suspicious behavior that can be seen as potential scams.
Asking people to PM you, offering Telegram/Discord/WhatsApp contact/other forms of off-site communication is considered suspicious as well.
I guess you were caught off guard during that moment, your appeal should get approved since it was an honest mistake.