Hi, it works by user tipping to bot first, and then entering their username, tipped amount and currency, and the target currency. Exchange is completed instantly. If you tip publicly on chat, everyone will be able to see your username, tipped amount and currency. This is a rare case but just wanted to let users know that!
Also, exchanged funds are always sent back to the same user, obviously
I see, so you are not referring to a user hijacking an exchange trade by switching the target currency without the user knowing. If I want to trade BTC to USDT, and then post it publicly, someone can send ETH to me but it won't affect the exchange process, right? Basically, it will become a privacy issue if a user is using the public option, which is why the private one is recommended.