Because it appears to be a remarkable tool for heckling people.
I’m logged in, and I can search for stuff, but it appears that a lot of people who use it find a lot of utility that I simply miss.
Case in point: Pete Hoekstra (R-Clueless) got today’s talking point, which was that being a Republican in the current Congress was a lot like the Iranian protesters being beaten and shot:
Iranian twitter activity similar to what we did in House last year when Republicans were shut down in the House.
Great googly moogly, it’s stupid, and there are hundreds of parodies out there, including a blog which has LOLZed some of the tweets: