Right, it's very easy to impersonate anybody on Telegram than on any other messenger.
Did you ever notice that there are so many scammers and persons who try sell you something? They have the same approach, same style, phrases etc: pretty girl avatar, "where are you from? I'm Nancy, Kelly from.."
They are so annoying and I thought everybody aware about it. Were you ever approached by scammers?
I stopped using Telegram for some time now because there are so many shaddy people on there. I prefer WhatsApp because people you don't have on your contacts can't easily write to you. You need to sign up with your phone number which provides at least a small level of security. And I wouldn't trust any foreign numbers any more these days.