Why would anyone un conceal the gun just because I’m in your car? The gun was likely the same level of concelead, it just took the cameras longer to detect what it was. A human can go “hey what’s that?” And when you tell them it’s a gun they can say no thanks. Are the humans monitoring the robo taxis really going to be that much of a person about it? They’re going to wait until they’re certain it’s a gun before doing something about it.

Also in some states you legally can ignore no firearms signs. A. If they’re not the right size/format or B. Concealed carry permits can just override them in some places. Not sure how it applies to a taxi. But in theory I can just ignore a no firearms sign on a restaurant. But that’s a concealed carry. Ain’t nobody concealing a full size rifle. Especially when getting into a car.