I don't really see anything wrong with watching a little bit of TV while out camping, if you have access to such amenities.
If it's what you spend the whole trip doing, then maybe camping isn't your cup of tea. I'd rather those people go ahead and sit inside and watch TV instead of sit outside were I can hear them complain about it.
Myself, I'm still tent camping. I can't get lucky enough to ever afford a camper, or something durable enough to haul one with. So, I don't have TV while camping. If I had a camper with a TV, I'd probably watch it in the evenings, just before I go to bed. That's basically how I use it at home, I don't watch it very often, except just before I go to bed.
Maybe some of the difference is that I live in the middle of nowhere as it is. I spend a lot of time sitting on the porch watching all different sorts of wildlife. So when I go anywhere, even a campground, it's going to be more urban an environment than I live in during my everyday life.