Why not have a forum, available to all, but where only the mods could post, explaining each yellow and red?
we used to have a community forum for yellow card holders. but soon admin found it useless because yellow card holders could not start the damn threads!! threads must be created by someone else and when created... you know the typical atittude of posters with yellow card... they trolled so the forum was completely deleted. i was yellowed by mistake at that time and tried my best to flourish the forum but didn't work out unfortunately.