It seems unnecessary to be against a block function when it is essentially the same like private or solo.
Just another post on the road to "I have no idea what I am talking about."
Your argument is invalid.
Yup.
From the point of view of a PvPer in open who wants targets what is the difference between a player you can't see or shoot coz they're in solo, and a player you can't see or shoot coz they blocked you?
Nothing.