Isn't that symptomatic of how the "net culture" has changed, though? Back when Slashdot was new, being on the Internet was something few people did, even less so without inhibitions. It was the lair of tech and science geeks, and that was that. People would dig up interesting science/tech articles and then the comments would debate it over and over (with of course random quotes).
However, nowadays you can't help but notice the politicization of the Internet and, by extension, of all things related to computers and science. I'd argue the politics section you noted highlights that fact: politics now influence this community far more than it did before. There are now ideological debates, megacorporations to praise or decry, lawyers to monitor, laws to bash or applaud... Blogs, social networks, all have changed the face of the Internet and I only believe it normal that Slashdot changed to reflect that.
I honestly wouldn't mind seeing more science and tech articles and less law stuff, but at the same time I'm glad I have a good source from which to read the latest developments in copyright crap or ISP abuses... I guess. Bah, you see my point!