All the time.  I have told people before if you are doing something illegal or unethical please don't tell me.  It's bad enough when I discover things on my own.  I honestly don't want to know because I will have to do something about it.

 

This was just classic.  I used to manage our service dept besides the rest of my job.  The idiots that I managed would say things to me like Oh look at all the stuff I got Christmas shopping today.  Well DUH you must have gone Christmas shopping on company time because the stores don't open before 9 and it's not lunch time yet. 

Or don't tell me you had to drive over 50 miles round trip to go home because you left all your weed at home.  Meantime I have customers calling having a fit because you haven't shown up for your 10 am appt.  Oh yeah I will just keep quiet.