Yes, they can snap, and so do the ultra light alloy versions.
I would strongly suggest that you forget about trying to save weight on your handlebars, This is one of the LAST places you should consider to lose weight.
Yes you can trust them. No they shouldn't snap. However, if you are using this for DH or jumps, weight is not really an issue and so you can get the same return on a slightly heavier ali bar.
