I see some high profiled account been Barned on daily bases due to several reasons but the most common is plagiarism. Most of which are contributors to the forum and the have contributed towards the active status of this noble forum. Can such users be appealed for or is there no other measure other than permanent barn on such users. Regarding the fact that with or with any user the bitcointalk forum still functions to its fullest. But comsiderative measures should be taken for older accounts sake of the pains it took such user to get to where they are at the moment.
plagiarism? Not a chance...!!! but there are exceptions... may be one or two.. i have seen here on meta section in some old thread... there were some users which were given a chance by theymos at least one i remember (I have to dig posts to find that user).
But in very very rare cases may be this exception can be executed again.
I've unbanned a few users for plagiarism. A feature was added where we can issue a signature ban instead and sometimes that is employed. It depends on the level of plagiarism as well. Sometimes people were permabanned for just one instance which is pretty harsh. For those that did it en masse though it's a different story.