Lazy *******s. Nothing more. Nothing less.
I think good on them for not caring what people think enough to let conformity trump convenience.
I've only done it at uni if I've accidentally locked myself out of my room & need to go get someone to let me in.
I think it's ridiculous... As was pointed out previously, it's probably contributing to the whole 'teenagers are all lazy ****s' image, and I hate that. We're not all like that.
I've never done it obviously, only in PJs that could pass as clothes. I have some plain black bottoms that just look like lounging things, a long black nightie that can pass as a dress when worn right, and I've worn PJ tops that could pass as t shirts or under a goody.
I have no problem with it whatsoever. As long as they're aware of the image they're presenting of themselves, what's the problem.
Its not something I would do myself. The closest I have got was going to homebase in some joggers. I did feel slightly ashamed at that.
As long as they're clean and properly covered up, there's no problem there at all.
Then again, I've never really understood pyjamas. Why do people have to wear a special type of outfit to sleep in? It's really weird. I just sleep in my regular house clothes.