Recently, I witnessed 3 out of our 4 managers joking about the company owner. These jokes weren't the normal "ah he's making me work weekends" stuff, they were pretty heinous in my opinion and it went on for over 30 minutes.
I'll just give one example. Our boss is undergoing surgery in a couple weeks. One guy said "what I would give to walk in and take the doctor's place after John (owner, not real name) was put to sleep."
The owner of the company probably isn't going to win any awards for best boss, but he is actually one of the best I've worked for. He approves just about any time off you request, gives out reasonable raises, and doesn't expect ridiculous hours.
I was able to overhear this conversation because my office is right next door to another manager's office. It made me really uncomfortable, but I'm not the type of person to rat on co-workers.
Would it be wise to tell the boss (anonymously or not anonymously) or should I pretend I never heard it?