Personally I think the block button should be changed to a mute button. I've seen a number of recruits block other players not realising that it stops instancing, and intending just to stop friend requests, which PVPers often send.
Getting around players you don't want to encounter adds to the experience- I say this as someone who is truly awful at PVP and has been killed many, many times in my T9. It's part of the game. You can pick times of the day when you can operate without interference, you can take a chance, you can make your ship ungankable. There are many options.
I don't see any reason to block people, but plenty of reason you might want to mute them.
Getting around players you don't want to encounter adds to the experience- I say this as someone who is truly awful at PVP and has been killed many, many times in my T9. It's part of the game. You can pick times of the day when you can operate without interference, you can take a chance, you can make your ship ungankable. There are many options.
I don't see any reason to block people, but plenty of reason you might want to mute them.