Can you give examples of such contracts?

As far as I know, renouncing the contract ownership is mainly done to make the community trust the dev could not toy around with the project. The issue you raises is something new for me. Executing a swap function without `owner` control seems theoretically possible. So if you could share some examples, it would be good.

After all, there is no short amount of scam methods involving a smart contract, a programmable contract, which some layman surely does not comprehend what it actually does or the possibility of the scheme. So it is essential to refrain from gambling around with some obscure and unknown token.