AS also does maintenance during this time and take their system off line. If your auction falls in this time (1-3 AM Friday morning eBay.com time) your snipes are placed just before AS goes down.
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 .