Bug was a mistake made by the devs and they didn't notice it

Some players were very lucky to find one and told their "best friends" instead of reporting it

then these best friends were curious so decided to try it out by themselves

Trying is not an excuse because technically those players still used the bug

IMO, those players who used the bug for any purpose should be punished

permanent banned for those who intended to use it

temporarily banned for whose who tried the bug