Lets just give them a bit of time off and then un-ban them, they are fairly good regulars and chances are they were just having a giggle with you guys. They don't seem like the type of people who enjoy being a dick.
If this comes to pass, just don't do it again, and if it was all a joke to begin with, be more careful, keep it to a minimum, people can still get irritated, at which point its better off if you announce your involvement yourself and offer to fix the damages, or apolagize if need be.
I'd still like to know how you came to the conclusion that it was PNGz and if the extent of this grief is exaggerated, however.
If this comes to pass, just don't do it again, and if it was all a joke to begin with, be more careful, keep it to a minimum, people can still get irritated, at which point its better off if you announce your involvement yourself and offer to fix the damages, or apolagize if need be.
I'd still like to know how you came to the conclusion that it was PNGz and if the extent of this grief is exaggerated, however.