How to prevent telegram group users from being stolen?

Question

Parsing

Hello. I found that in my group, competitors are stealing our subscribers. As I understand it, it looks like here, for example, they wrote: How to pull out all the members of the Telegram group? and here How to parse contacts of all members of a channel / group on telegram? .
The question is, how can you protect yourself from such a disgrace? Maybe there are some bots or something ...
The main thing is that 100% of us could not steal subscribers.
And one more question, how can I set up a bot in a group so that spammers cannot post their links?
Thanks to all.

Answer 1

And one more question, how can I set up a bot in a group so that spammers cannot post their links?

bot is configured with anti-spam: it kicks / bans spammers after the fact, or when there are a lot of accounts -
you can use a self-written nickname, you can use all sorts of protectronbot (you need to understand what they charge for free)