^Words are neither copyrighted nor owned in anyway by anyone. So be gone, bye.
You are absolutely wrong. Words are copyrighted the minute they are written. Expression of ideas, facts are protected under copyright. So all of that "words cannot be copyrighted" is absolutely wrong. So you are infringing other people's rights.
Copyright of the posts is the reason why many websites have mention of copyrights of posts in their terms of service - For example MJJC rules state that members authorize MJJC to use their posts and cannot make an infringement claim. MJJC rules also say that authors are responsible for the content of their posts. All of this point out that each person is the owner of their own posts and the accompanying copyrights but have given MJJC permission to use them. So unless you got permission from the people whose posts you are copying, you are infringing their rights.
Regardless of the legalities: I'll never understand why you copy/paste other people's posts. It makes you look like you can't form an opinion on your own. and that's not good.