and to add to that... if they wheren't a slightly polite/considerate neighbour, they'd just go straight to the police... and i think most of us know who we'd prefer to have knocking on our door asking us to sshhhhhh unless of course you live next to mr robboHmmmm, let me think.....the possibilities are:-
a) Your neighbour is sooo delicate that they bother to come round and complain, and as you put it, 'spoil your fun', when in fact, your shooting indulgence isn't that intrusive at all or
b) You have an inflated opinion of your 'own fun' importance and your neighbor actually had a legitimate complaint.
I know what I reckon it is after reading the tone of your post and just in case you can't work out what I am suggesting...it's b)