Some of them do and some of them don't. Some are old fogeys who Just Don't Get It; some of them can be forgiven and supported despite, some I don't think should be (Patrick Leahy, for me, falls into the former category, since I'm from Vermont and sentimental about him on several levels, even though he is genuinely just awful on this particular set of issues). Some are unfortunately beholden to some interest or another but are otherwise decent or even good (Al Franken comes to mind, with his obvious connections to, sympathies with, and it could be argued blind spot regarding the entertainment industry). Some deserve the smackdown. In fact, I'd go so far as to say most. I was hugely disappointed in some of these people, and some of them have always been generally terrible.
This.
While SOPA/PIPA is a joke, a lot of people are FF on other issues on that list.