There's a whole other thread about the porch lights on/off and if it's a rule or not. There are several people over there who have never heard of this rule. So, I really don't think it's a matter of common sense. Obviously, if the whole house was blackened, you wouldn't go there but if it is lit up, all but the porch light, I can see how people might not realize they don't want ToTers.
I would agree with the 10pm thing IF it wasn't Halloween AND a Friday night. Like I said in another post, I fully expected ToTers late into the night this year and was surprised when they stopped at 8:30.
The bottom line is, if the OP was done handing out candy, she should have not answered the door. But she did. So how can she be angry at the mom and 2 kids?