does the bot allows other tg to register and bind themselves to the same UID
Yes. Anyone can use any username/uid, even if it's already in use.
If it is possible, how feasible is it to make a restriction where once an UID is bind to a TG username, no other TG username can connect to the same UID anymore? Suppose an impersonator get ahead of the original UID owner and registered the UID to the tg bot, the original owner can just write here to sort it out? If... that's not too troublesome.
Sounds like a lot of trouble for no added benefit. Anyone can create their own scraper/bot, fork the supernotifier, etc... or even add your username to the "tracked phrases" to get the same (mention) notifications. Probably better to add some kind of additional verification tag if necessary.
[...] and having my TG enrolled to a telegram bounty campaign without my consent by a bounty abuser. Your list will kinda act as an open buffet for those people, giving them list of available telegram contact and the forum username associated to it.
That's not how this would work. All I would publish is that joker_josue and LoyceV are users of my bot, and thus they will get a notification if mentioned. I would never publish that their telegram handler is @jokerjosuethebest123 and @loycetotallyhuman.
