I don't know about 100% removal. But I started a thread last month about noticing fewer corked bottles from very recent vintages and there seemed to be relative agreement that this is indeed the case. So another step forward doesn't seem unlikely. (I did have a corked 2018 Beaujolais 3 weeks ago, though. It was only my second corked 2015 or more recent out of maybe 100 examples; compared to an old ~ 1/12 average.)
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .