From PFCorner's userpage: It seems just a waste of time, we never get any reply.
When even Personal Mail doesn't convince people to accept help, those people surely need help.
In case warned users don't want to accept help, then PFCorner is wasting their time (and resources), obviously.
Maybe those weekly 'you have been warned and we don't give a damn about you' emails should be changed.
Let those people feel they are a 'valued user', but have forgotten to seed.
Not being just another user biting the dust, because of disrespecting the rules.
Not everybody understands what bittorrent is all about.
Warn them at 25 GB, offering them a way out until they download 50 GB (or something like that, to finish unfinished downloads).
All currently 'warned' users should be emailed (those weekly emails should be fine) about PFCorner is still offering an easy way out.
And grant them upto 50 GB. In a couple of weeks, evaluate how many 'warned' users are trying to solve their problem.
Still a 'hit and run' mentality? Then back to the old 25 GB and change 'warned' to a more a more appropiate title.