You don't need to be logged in on Twitter to read the tweets or threads.  I hardly ever log in on my computer, and read certain people's threads every night.  I think some smartphones throw a Log In page up, but it should be able to be dismissed.  I bookmark the people I want to read, because when I "followed" them, half the time Twit wouldn't show me their posts, and then I was suspended and they "unfollowed" everyone for me.  Nice of them, huh?  I only log in when I want to comment or retweet.