Yeah, that's most people's first response..nobody likes to be told what to do..which is why the cold call on the front door isn't very good for neighbour relations. But the by-law rules exist for a reason...some complaints are obviously not very relevant..however..you always have that one neighbour....
In my recent conversation with the bylaw office (about a trailer in my driveway) I was told that it wasn't anyone on my street that complained about it. Apparently someone who lived in the city lodged a large number of complaints about different properties in different parts of the city. Some people have nothing better to do than complain.