The forum already has the option to report. Restricting giving merit in one section will make these members move to other sections of the forum. So better option is report them so that their account is flagged red and becomes useless.

This hack must be responsible for lot of hacked high rank accounts which were meant to be sold. But merit system broke the heart of these hackers and sellers.

If you see the later videos of this guy, he got some views. So one can always learn from mistakes and improve.