That's the point.
Merit abusers can not circulate their original merits forever.
They are limited and have to come to the end someday.
I wouldnt worry too much about merit abuse.
There is a limited amount of merit someone can merit themselves unless they have a source in their pocket.
It is the key reason why @Theymos implemented the merit system and new rank requirement with main purpose to give spammers big motivations to change their posting habits.
I don't want to mention about Spambies from massive farms, but only main-account spambies. Some of them have changed, and might change in the future to be better publishers, in my positive belief.
Unless of course they make a habit of making good enough posts to otherwise receive merit, in which case the abuse wont have any meaningful affect.
Totally agree with your proposal.
There is no evidence for merit abuser if post has deleted.
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So how it will be if "Disble delete option for merited post". So abuser will not able to delete.
I don't think so, especially for Junior Member rank. We all can not say that someone is merit abuser by getting one merit for non-sense thread. During my time I spent in the forum, months after the beginning of new era with merit system and new rank requirements, I have seen several threads got meritted by higher-ranked members for almost non-sense threads. The key point is here, everyone have rights to give their sMerits away to any thread they want. For instance, some threads which make they laugh, even those ones are non-sense threads.
Consequently, it is really hard to say someone is a merit abuser by sending or receiving only on merit, in my point of view.
To sum up, your suggestion is only meaningful for more-than-one-merit-receivers or senders!
After merit implementation for jr. Member , I think this kind of case increasing. Hope admin will consider Disable delete option on merited post.