This is deep I must confess.....
If there is anyway to remove this on the blockchain I am sure it would have been done... Flagging is part of it but the issue is those that have enough to do the heavy lifting are using it for the wrong reason... As much as we know that this act is from newbies they can be warned and warned again but if it continues.... A little flagging is not a bad idea but to my surprise even the minnow and dolphins are guilty of this some are just ignorant and some are just in for what they stand to gain even of what they are sharing on the blockchain is copyright
Steemcleaner is trying to do this job effectively as possible but what can stop it apart flagging
Constant coaching of the newbies because most of them don't know about this law and the ignorant ones and also make scape goats once in a while
One of the rules on the community am on... On the steem blockchain is do not plagiarise and also image source