[blueplum]

well, I don’t know. In the lawsuit below, BLM names themselves as an entity:

http://www.nbcnews.com/news/nbcblk/chicago-black-lives-matter-sues-city-seeks-court-oversight-police-n772536

[Alberta's Child]

The devil is in the details. Black Lives Matter Chicago may be an actual entity, which would probably require it to be a registered corporate entity in order to function as a plaintiff in a lawsuit. That doesn't mean the silly "Black Lives Matter" movement has any legal standing that could be named in a lawsuit.

I'm not a lawyer -- but as far as I know, only an individual, a government, or a registered business entity (corporation, partnership, limited liability company) can be named as a defendant in a lawsuit.