@u_touch_my_cookie No!
Please don't delete your account. Copyright Infrigement doesn't result in legal action, as long as:
1. You don't earn money of off it.
2. You give proper credit, to the due authors.
3. And, lastly, if the above two criteria aren't meant, You don't fight back.
Besides, as sad as it sounds, I doubt that either Rick, or Penguin, care about a fanfic written by a person, somewhere on the internet, and surely, not enough, to take the matter to court.
There is no need to take your account down, as you have got a whole community around you, many of whom will check out whatever you decide to create next.
Please, I request you, do not leave this site.
Sincerely,
A follower, from the last five years.