IMO nothing you could CC well is gonna be a fair match up against a terrorist with a hi cap rifle & many spare mags. Holliday season & gatherings tend to involve lotsa hugs & touching, so there's that. To answer the OP's ? Terrorist events, no. Weather/temp, dress, body shape, location/situation YES. Anyone who can feel my pocket carried Seecamp is hugging a bit too intimately. Pretty much anything on a belt (IWB/OWB) or shoulder holster has a much higher risk of discovery IMO.