Any employee who brings embarrassment to a company or does anything that could potentially harm the company’s reputation, create a dangerous environment, or even damage the culture, the employer has the right to terminate on that reason. Think carefully before making any career killing moves - including those nude photos that could end up being circulated in the workplace!
Should you approach the boss as a group if you want to air your grievances? Only if you want to be fired as a group! Tred lightly and consider against intervening en masse, per GoToGreg.