Yep, not a good idea in my opinion and I wouldn't even consider doing something
like that. Now I do remember people doing this back in the day and they would
plug in interesting stuff like humidifiers and the like. Just a bad idea and
even as a kid who knew little about electricity, I pondered the wisdom of such
things. I do recall Lee the old-style porcelain fixtures and those adapters
you could screw into the fixtures. I in fact remember my father having one in
the basement and I'm trying to recall what was plugged into it. I'm sure it was
something the fixture wasn't really rated for of course. The things people
will do .
Now here is one for you that falls along the same topical line. Using one of
those work lights (the type with the metal housing) attached directly to the
wire coming off the switch with a couple of wire nuts and allowed to hang
freely. Yep, that is what the previous owner did here. Now that was clever,
don't you agree? Oh and of course I took care of that as soon as I moved in. :)