I've been active on Twitter for a while, but I haven't gone through the trouble of "curating" which is to say, using a third party client to avoid the (often propagandist) spam and blocking everyone who says insane shit. And it's not just a simple matter of "being careful about who you follow" since you can follow people who have reasonably well-articulated opinions, but whose followers (or others attracted to their Tweets) are toxic and may number into the tens or hundreds of thousands (e.g., Matt Yglesias posts a lot of interesting stuff, but the comments are often a shit-show). That's a lot of shit to wade through.