You should have reported the group behind you to the clubhouse and let them deal with them. Better yet just let them play through. It's what i've done with groups that are impatient.
Not putting the flag back in escalated the whole incident and someone could have been seriously hurt. IMO it was not a smart move on your part. Both groups bear responsibility for the escalation and should just take it as a lesson learned and not to try something like that again.
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