One part that should also be put across as regards plagiarism on this forum is that,it doesn't really matter when the offense was committed..

You come across appeals where the OP claims he only did that(plagiarised)when he was a noob(for those who have ranked higher)
The fact still remains that a plagiarised content was found in your post history
It doesn't really matter how far back,as long as you're caught,you will definitely be banned..

So noobs who plagiarise now, and probably do not get caught,and happen to rank up...
Probably someday in the future,you could login your account and get the ban message
See you in Meta then...