Hi @mbell, I am now doing review on my following list. This type of damaging post should not appear in my feed if I had practice a cautious way by visiting them before adding them. My mistake was I normally just follow anyone that followed me. So, from now on... I will change my style to check first who is worthy to be followed and not just anyone.
My advise will be the same as @rlt47, just unfollow them, that's the best thing to do.
Stay blessed and Steem On!