Seems she made mistake on past, and her ban is appropriate as well according to forum rules. But some case are excusable and a self made account being parma ban for previous mistake just for single plagiarism. It's really not appreciated. Yes, she may deserve any temp punishment like you said signature ban for a spam of time or temp ban for few weeks etc. She has been contributing for forum and I have noticed it from beginning. And I believe she isn't spammer at all like other people's.

I would like request to theymos please reconsider that case and give her a chance (second chance) for her contribution, so that we will get few good contributions from her.

OP, please try to contact theymos via PM or mail. Use this thread as a reference hope he will forgive you. DON'T GIVE UP.