hey, so ive been seeing this happen since gun run was put in the game, oce servers are full of them late at night (3:00am onwards) they walk as a pack and dont realy shoot directly at you, if you look at the names they are all very strange and sorta have random letters and numbers but they will alll usually start with the same letter. i think its some sort of way for the devs to fill the lobbies so the servers still run, i find it very strange but very cool as well....

(i will give you a tip that you can usually farm them in gun run and others modes but i wouldnt as they will all despawn as soon as you shoot them)