[Sunflower49]

Much as I prefer glass, to plastic 'glasses', they aren't THAT bad. I think it's a good idea. I agree, if the dullards that use glasses/glass bottles as their weapon were sufficiently punished, it may curb the crimes, but I think that's unlikely.
Also, it's sad that old pubs are suffering because of idiots-plastic glasses are fine in dodgy nightclubs, but at my local I can't imagine old Jimmy sitting at the bar with a plastic beaker instead of a tankard, or at least whilst being happy about it!