Do you have a lot of unwanted things in your twitter feed? Sure during major events some things creep into mine but it's rare that I get a lot of political talk because I don't follow that many people who tweet political things. You can also use lists to curate this. I'm sure there are great twitter knitting lists that wouldnt have political tweet in them.

The lists are less used than reddits subreddits but they function in a similar way.