Call of Duty Black Ops 4 General Discussion Forum . In team killing rules, your mistakes kill teammates who will 9/10 come back and kill you.
In Call of Duty: Black Ops III, friendly fire is enabled in Hardcore game modes such as Hardcore Team Deathmatch. Just like in Black Ops II, after three teamkills.
Call of Duty Black Ops 4 General Discussion Forum and have 0 control over it and in my opinion it should count towards the 3 team kill rule.