Can't block players unless having just played with them

Seriously, when I cannot block a player outside having already played with it, it is getting ridiculous.

Adding a name through the Options -> Block Name doesn't work, and when finally accepting a friend invite of the one I want to block just to be sure I get the name right, seeing the error message "Oops" (useless...) when trying to block him directly from the list is nothing short of infuriating!

Also, the name indexing of the block list is INSANELY slow! Make a simple .html list to keep the names in, if you insist on them following the user and not the PC.

Also, not being able to do anything else in the client while the list is indexing (or while in queue or waiting for the match timer to reach 0) is also a major inconvenience.