If that telegram user is a scammer and you know it then you should report that user right away and I also created a thread to prevent random telegram users from adding you to random groups without your consent. It happens to me everytime before I find out that you can prevent it. Here's the thread link
https://bitcointalk.org/index.php?topic=5072351.
well, that is great I didn't know that we can prevent it thanks for the link it was helpful for me as well. This is the power of sharing knowledge.