I would say start a thread in toke n talk warning members not to discuss activities that may be illegal in some states with anybody they dont know in person .
If i was truly thinking i was being lead or set up by a narc i'd tell the members i was getting questionable pm's from a new unknown member & i think it may be LEO .
What i wouldnt do is to pm other members the newbs username nor would i post his name in open forum , this can lead to a bad rap on some newb who dont know better & is just trying to get by , it can start drama & fights .
In reality anybody breaking site rules & discussing known illegal activity should have their pm reported to staff using the report button & tell them your side .