I have gotten it caught on branches, had themarker fall out of my hand and other kinds of horror stories.
It has never broken on me. IF you are afraid of it breaking try getting some thick walled vacuum hose, the kind used on import cars for the vacuum line. I'm not sure what the rating is but I think it should be way abov the 750 - 850 output pressure of most regs.
The only way I could ever see macroline breaking is if it's really cold outside.
I'm talking more then just a few degrees below freezing.
Return to the free market. Get rid of all government regulations and let society make it's own decisions. Time and again the relaxing of government regulations has increased profits, innovation and the economy.