I think the stories of military canopies and their toughness, while interesting, do not really apply to the original question. An LSA is built to a light weight and the canopies are substantially thinner than than those of a military jet.
There are several "documented" trials of people using the small hammers that are designed for toughened glass on a light aircraft canopy.
EG:
I used my cracked canopy to test canopy exit tools - VAF Forums
Or
https://www.youtube.com/watch?v=fRvQ...ature=youtu.be