A tiny thing but one that is ridiculously frustrating: wrestlers pinning their opponent and not covering the shoulders. It is literally the aim of the game. Lying across someone's stomach doesn't do the job, guys! You have to hold down their shoulders. It is so simple but when you don't do it you make a mockery of anything that helps wrestling resemble a sport. If someone isn't holding down your shoulders then you don't have to kick out, you can simply sit up. The only time this is acceptable is when someone is making a point, when they have beaten an opponent so badly that they know they can't do anything and are easy pickings. The rest of the time, it makes you and your opponent look bad.