A good idea can be to reward with airdop merit the start of this thing, to reward users who reported.
No. This would then lead to abuse. People would just report loads of things for the merit and easily rank up their alts this way.
This can be done once when the system of reporters ' icons is introduced (as it was done when merit was introduced).
No abuse of this will arise, and the forum will receive some additional Merit from reporters
Make a single Merit's airdrop for every 300 or 500 good reports
I understand very little of this, but abuse will happen if you merely get it 'airdropped' just for reporting. It's basically a free and easy way to get merit without actually earning it. Anyone can report a spam post, not everyone can make a quality/orignal post. People will almost certainly just start reporting their own bots.
They can expect anything. Declare that airdrop is a single and will not be repeated under any circumstances (precisely because there may be abuse when re-conducting)
Or make it not happen at all. Can you tell me exactly why you think this needs to happen at all?