This not armed robbery - this is a parking violation.
If the violation is staying in the restaurant 10 minutes too long at 3 in the morning.
The theoretical fine listed in the rule book is $25,000 for particularly egregious alterations after the balls are checked in. In practice, it gets a reminder notice at worst for rather more significant alterations than this (putting the balls in front of a forced hot air blower on a cold game day - which would not only majorly change the PSI, but make the balls more flexible).
https://www.facebook.com/PathfinderRegionalVocationalTechnicalHighSchool?fref=nf
Pressure drops from 13.5 to 11.9 in minutes... technical school experiment...