What's worse is when they take it a step further and blame an entire medium. This is discussed in Scott McCloud's Understanding Comics. As if a medium should be judged for the content people deliver through it. The same way games are violent, tv is filled with sex, and books make you smarter.
In a way, this is how a lot of musical judgement in our own community comes from. When I say I'm not an EDM fan, I understand there are probably EDM tracks I like. But it's easier for me to classify an entire medium as something I'm less favorable towards.