If you post a track that violate copyright you will be flagged, you wont be able to monetize it and your reputation will be ruined... Its up to you if you really want to go that way...
Labeling is just common sense, just use the tag that better adjust your genre and thats it... Dont worry about abuse, if you see someone making abuse just flag it and report it on the discord chat... There are curators that are constantly checking the content...