Teachers and small man syndrome

I am sat here pondering and trying to set down some cogent thoughts and realise that I have so many different random thoughts firing through that picking anyone would be dumb. One major issue is why do some teachers feel the need to play mind games with kids. They are already in a position of authority, why not be content with that! It's tough enough for kids dealing with puberty, raging hormones, exams, choosing courses and trying to find their niche in this world without having small minded teachers exercising their small man syndrome(in this case) or any other agendas on kids. I know that teachers are just like the rest of us and have baggage that they bring to work but I resent seeing it inflicted on kids, they should be trained and professional enough not to do it.