I get the feeling not everyone in this thread has read the OP properly. This isn't about PVE players blocking PVP "griefers". This is about the possibility of PVP players blocking other PVP players because the former are not as "gud", or have more weakly Engineered ships, or have limited funds for insurance.
As a PVE player this is all academic to me but I'd be lying if I said it didn't amuse me a little, assuming it's true. Also, if this is relatively new behaviour I can't help but wonder about the timing. There may have been changes to the way Blocking works but there was also a significant purge of exploited modules not too long ago. Might it be that some formerly apex PVP players now find themselves flying less than apex ships, and are taking advantage of the game's mechanics while they re-roll for their various Grade 5 modifications?