These images are certainly frightening, but do not motivate me to abandon glass fermentation vessels. Ultimately, I think we are choosing our poison here, as glass comes with obvious risks -which can be very well-controlled through good practices- while plastics leach known an unknown substances into our consumables, affecting our ferments and our health in subtler ways than a slit wrist (heat and caustic substances greatly increase this tendency).
I believe obvious risks are often easier to avoid, and have opted to put the burden of safety on my own shoulders, rather than to trust repeated long-term use of plastic (I have used it). The danger of glass lies almost entirely in how it is handled.
That being said, what I have noticed on some of my containers (the ones that match the square-paneled 5-gallon carboys) is that there are obvious seams on the bottom, which may be contribute to the "clean" breakages at certain points or lend a susceptibility to thermal shock or increased static loads.
My vote is on higher quality glass, better safety procedures (fill in place, thermal acclimation, not carrying full-of-hot-wort carboys down into the basement-which I have done- etc.), and inexpensive accessories to reduce the risk of injury.