I don't worry about that - all the Glock nay-sayers love these kinda pictures. Turth is - it could happen to any gun. And, the issues seem to almost always revolve around the 40 cal - it is such a high pressure round. Even when not shooting lead (so no worry of build up), many people have issues w/ reloads in the caliber. The brass weakens over time, and eventually there is a case rupture.
In 1995, I had a squib in a Glock 17 due to bad reloads. Bulged the barrel VERY badly - but, all other parts of the gun were fine (took a gun smith to get the gun apart). Ever since then - I refuse to use any reloads.