Definitely agree it's just baiting a ban by running no tags but getting involved in the same situation with your gang members. Not sure why people can't just have a good time and not try to skirt the grey areas with regards to running no tags. I have no clue who the players are on either side so this is just an observation from the outside. I've dealt with people running no tags on other servers in the past, and have dealt with it a lot on this one. Also, it ruins player experience saying "give me X or you'll be banned." Let the situation play out and see what happens. Submit a player report if you feel the player broke rules.
I would suggest a rule change to say "If a gang is initiated on then all gang members, regardless of tags, are initiated upon in the immediate vicinity. However, un-tagged gang members must still initiate individually unless fired upon." This would allow for gang [A] to initiate on gang and eliminate all of 's gang members regardless of tags. It is must more difficult to identify a player without tags because you must first read their name and then the grey gang name. However, it would still require the more covert un-tagged gang member to initiate separately. As I just stated, un-tagged players are more difficult to identify because their gang name is in grey and on a second line.