I don't think anyone looks down on people for being a paralegal; however if you were a paralegal and you bring up that every single time you speak in class, you can expect your class mates to be fed up with it. We had one paralegal-gunner in class that literally started every sentence with "When I worked at Sullivan ...", and needless to say that pissed people off to extremes. She was smoking hot though, so she got away with it, sort of.
Anyway, if you haven't been a paralegal and you're thinking about doing that for a few years first before going to law school, I wouldn't bother. It's not horribly relevant, it's not going to help you (much) in terms of employment.