In my point of view, i would ban them for Random Death Matching (Mass) because even though they only killed 2, they still broke the rule for random call-outs, and if they had the chance to kill them they would.
Why are you asking this, did this happen? If you have any proof just report it by clicking below.
http://www.tns-gaming.com/forms.php?do=form&fid=19
Sorry if im not allowed to post here, just trying to give an answer to a question i know about.