I'll consider it one of the best ideas as, it's preferable than removing all airdrop merit. The old era-member who were quality contributors won't find it difficult to earn merit but the spammers will get trapped and they'll be the ones disturbing the forum with complains. This suggestion if implemented will also turnout to be an advantage to the airdropped users as, they won't be overlooked by campaigns managers when applying for a slots like they're currently been overlooked.
Only problem with my idea is that something like this was supposed to be implemented in time when admin is introduce merit system, but it maybe still have good effect because all good members will probably keep they ranks since most of such members earn 100+ so far. But many members ranked before merit would be deranked, and they will probably never earn 100 merits.
Personally, I think something like this will not be done, it is maybe too complicated and no matter how much sense it makes, it would not be fair to punish someone who was doing something by the old rules. Merits have certainly made a very good move in creating a better quality ranking system, and some new measures are likely to be introduced in the future.