Having read the thread on the bent top tube on a CAAD8 being a potential safety issue, let me ask this.
I have a 5 or 6 year old Giant Rincon I was going to sell, my kid has out grown it and we got him a new bike. Because the bike was too small he had extended the seat post beyond the recommended limit and this has resulted in a bulge in the top of the seat tube. I can still fully insert the seat post and the clamp holds tight, although it does not sit completely flush on top of the tube.
Is this potentially dangerous? I don't want to sell someone else's kid a hazard.