Thats what I thought would happen to my dog. I live in a townhouse and share one cardboard-thin wall with a family. She is a small breed and the most neurotic dog I have ever met. She used to bark at things she imagined hearing at our old house, she barks at loud things like the door bell, or the door bell on tv or the doorbell next door, and the mailman and the kid who comes to put coupons on the door. But other than that she has been very very well behaved I'm surprised.

Plus I'm very quiet and the people next door are....not (see the entry a few days ago about people knocking on my wall at 3:30 in the morning). So I will occasionally blast music loudly up until 10 when I don't think they're home or let the dog bark longer than she needs to when someone knocks on their door. Chances are your neighbors will be louder than you are.