Really? Nobody has told me that yet - do you think I should tear it down?

Look fellas - I weigh 180lbs lets call it 200lbs with gear. The wood deck probably weighs another 40lbs.
Thats 240lbs on top of 5 verticle support columns with 4 cross braces to distribute the weight (when I'm on the left side, portions of the weight are distributed to the right side towards the bottom.) Thats a mear 48lbs on each support. I could build the thing out of toothpicks and it would hold 48lbs. If you don't think a 3" PVC will support 48lbs for a few hours a couple days a week then hold ur breath and wait for my post entitled "MY PVC Stand Broke - I was wrong!"