Black list shared button or not

Is it necessary to add a Blacklist Shared button in OGS? If I play with someone who mess around the game, and you can share my blocking by click shared blacklist button on my name.
It saves time for someone in OGS.

People who score cheat, stall, troll, or otherwise “mess around” should be reported to the moderators, who will deal with it in an appropriate manner. Reports can be made by clicking the triangle in the right-hand panel of the game tab. OGS frowns on any form of public shaming of individuals.