"Last night I was attacked by a hooded shabby bitch."
"Last night I caught a hooded shabby bitch dipping me."
"This morning Marty(faction member) cloned out, not sure why." (if no faction member saw who did it)
"This morning Marty was killed by a hooded shabby bitch." (if another faction member saw it and didn't immediately die, or if it happened in public)
"Yesterday afternoon someone took my weapon. Didn't see who."
"A hooded shabby bitch pulled down some cameras on [room name]."
"Three days ago Marty got shot by a sniper from the south when he was at [location]."
With a little tinkering, you could set these NPCs to recognize certain characters (known enemies of the faction, members of rival factions) and they could even give you exact times if they had a watch on them at the time of the incident.
A lot of chatter stuff seems to have stat/skill gates which is sensible if you're collecting gossip from bartenders, but all this is stuff most faction players regularly have to @request-puppets about and there are no skill checks there usually. I think the more players can self-manage their factions, the less attention they need from staff, which benefits everyone.