The system proposed with credits and forced community moderation is just not fair for the community. I see in a reply that you stated people should just “forget” about inappropriate content. You have to keep in mind that some people are more disturbed about certain topics than you might be. The point of the DevForum is to discuss development related topics, not moderate a forum about development. DevRel has already removed the more community moderation systems due to it being unrealistic for an ever-growing community.
Buildthomas has already created a post elaborating on a more proactive method of moderation that is better suited for the growth of the platform and for future scalability. While I do not agree with everything in it, I totally recommend giving it a quick read as it presents great information on how prevention can be better than moderation.