Pointing fingers at others and denying responsibility apparently is preferable to owning up to theft. Laughably, this person believes that blocking others will make one's own posts invisible to the blocked person, and apparently has assumed protection from being reported or corrected. Eventually the message will permeate even this sad individual- stealing is wrong and it's no conspiracy when many people disapprove of theft and lies. Those who consider themselves exempt from ethics or criticism don't belong here, or anywhere else with standards of decent, honest conduct. Posting here means accepting being rated, and rating is the right and responsibility of every member.
Honest criticism is every real writer's friend.
The best English professor I ever had was author Larry McMurtry. He made us revise, edit and re-write, honing our craft and skills even while driving us nuts. We can be scrupulous in citing our sources and being original in our posts. And we can refuse to tolerate thieves among us. Any instance of plagiarism should be reported to abuse.