I do not think it is ethically right for someone to edit other person words. You may comment with what you want, or vote to delete if you find something wrong in what is written as a principle (racist/illegal/... etc), but not edit.
Execuse me if you have some extra time, u may use it to correct a scientific fact,answer a question,..or even have some fun; do not waste it in trying to impose ur opinion or writing style on other people. This is a discussion group, not a paper or a thesis that has to follow a certain format
By the way, it is also a well-known principle that u should prevent read ups & write downs to protect from Trojans. I suggest you should not give a higher privilege user the right to edit someone else's question or answer.