I once went on a residential course, only to find one of the instructors was one of my own staff, albeit a freelance part-timer. A decent bloke but regarding the subject matter of the course, I knew his knowledge was nil and experience less than that. We were both a bit embarrassed but I was more vexed at the lack of integrity of the training company claiming 'leading figures in the field, unmatched in their experience and expertise'. Fucking cunts.