Nowadays, there just too many situations where some people will copy 0r duplicate others fanfictions. It was really scary as I know how hard those writer wants to create a good fic n of course they want readers to appreciate their efforts. But, when people simply copy their idea it was so unforgivable. Although I don't write any fic but I truly understand their feelings as an idea is what make a person creative. but when there are other fic same as other fic, people will start to doubt which one is the true one. it is just like when we work hard in doing something but our team members claim it as their work & get the reward. it is just SUPER ANNOYING & I've been through it once & certainly didn't hope that it will happen again.
For those out there who take other people works as their although they modify it, YOU GUYS must realize that if you thought that you will get away with those acts, think twice cause you will just repay for your actions. Be reasonable to others.