I think in general, clients shouldn't be assuming everyone joining wants bitcointwitter, nor should they be catering to bitcointwitter tastes. Just an imo. 

Just looking at this recommended user list is kind of off-putting about the general vibe. (Although not perhaps inaccurate about the state of content here). But perhaps exacerbates the problem(?)

I think opt in / follow all would be better, rather than 'unfollow all'.

Some absolute stinker accounts here too lol.