What do I do as a user if I encounter an account of someone that is just blatantly copy-pasting from all over the internet without ever giving links to his/her sources? Flag all the posts? Flame his/her mother and/or sister?
EDIT: One possible way to go is to inform the SteemCleaners about such posts. Check out their announcement here:
Announcing SteemCleaners, the Steemit Abuse Fighting Team!
You can even earn Steem for reporting genuinely bad content to them.