What are my legal options when a By Law officer comes to my door?

[Sassygirl]

Hi everyone! I am just wondering if anyone has experience with a By Law officer coming to their daycare? My neighbours on the one side of us are... to put it mildly... something else! I have called animal control on them and we have gone over there repeatedly to ask them to keep their noise level down. It seems now, we have started a war. There is all kinds of unacceptable behaviour happening, such as them littering on our lawn, etc. Today, when I am well within my legal limits of having 5 kiddos plus my own son (all toddlers between 11-15 months old) I get a knock at my door from a By Law officer during naptime.
I was up having a "rest" myself LOL and didn't answer the door, especially when I saw who it was. I was floored. Nothing was left so I have a feeling that they will be back.
Anyone know what my legal options are? Do I have to open the door? What do I need to say except explain that I am well within my legal limits? I am quite annoyed by these neighbours to say the least and if they are calling By Law officers on me without cause they are going to have a huge problem on their hands.
Thanks in advance!