Well, that's certainly an opinion, not any kind of fact and calling someone a moron for his guitar choice sounds more like your issue than his. I know a number of guys who like the way the larger guitars feel. I played with a guy years back who loved the hollow bodies because he grew up playing a lot of acoustic and when he started playing more rock music, they felt like a more natural move. I don't see what the big deal is. It would be one thing to say that some guy in a pretentious indie band plays one to look cool, but AC/DC? It's like saying "It isn't necessary for Keith Richards to play 5-string tuning on his Tele. What a pretentious jerkoff."
When I see Malcolm Young I don't think pretentious... I think truck driver. Besides, everyone knows that rock stars don't care about their appearance.
I am positive that one can factually determine that it is thorougly impractical for reasons already mentioned. It is like someone playing Eruption style finger tapping and choosing to do it on a 12- accoustic. You can do it, but the tool is not the best tool for the task (yes, this is a more severe example than playing metal on a L-5). It can be converted to become resonably suited for the task. Maybe some people even convert these guitars for reasonable reasons, such as your example that they are more comfortable with a thick guitar, but even then the image is absurd to me in a 'Spinal Tap' type of way. That I find it absurd in a 'Spinal Tap' way is indeed an opinion. Perhaps some people think it is cool that their amp goes to 11. Perhaps it even does make them cool. But that is not going to stop me from laughing at them. If it doesn't bother you I can understand that. I am not demanding that you find them silly.
