I've never personally experienced a problem with a co-worker or a team member but I am a cheerleading coach for a junior football league team in town and I have experienced problems with parents not being happy about what position their child is in or if she wasn't in the front row and how I solved those was just talking to the parents about my methods and my ways and then getting them resolved from there and if most of the time parents that were upset that kids didn't have playing time would be kids that didn't come to practice so I would just encourage the kids to come to practice as much as they could so that they could get as much playing time or showing time or flying time as possible