I can just see it now, how it would go at the check-out register.
"Sir, I need you to show ID, sign this log, and you can't buy all four of those, you can only buy one at a time."
"WTF? My 60s party is going to be a total flop without ALL 4 of these."
"Sorry sir. I guess your party will be collateral damage from the War on Meth."
Computer programs expand so as to fill the core available.