Rollop
Legend
It's possible sure. I fully expect gold to work like Aradiel has said. That's what I'm saying, they wouldn't mess with current stuff, just a further restriction is in place. If they mess with XP every 19 twink that runs out of time and then plays would be completely screwed, which seems a bit crazy.
This has happened to paying players in the past. Again, during cataclysm. Exp off has been toggled on, causing many twinks to accidentally out level their brackets. If they don't care about currently paying customers, I very much doubt they care about recently paying customers.