I prefer glass personally.
I read the article in the Times in detail. The pubs prefer glass because the plastic has a shorter working life, therefore they cost more in the long run (and actual beer tastes horrible out of plasitc), and the general consensus of the group designing it was that a "safety glass" approach would be the best route to explore, as it's less dangerous and has no adverse effect on the taste of beer.
However I agree that bars with a history of glassings should be forced to use plastic as a temporary measure until this new glass is brought in, and whilst there is no actual evidence it's probably reasonable to assume it's not beer drinkers who do the glassing. Rather it's the chavy lager louts, though again there is little evidence either way.