I once had a work colleague who was known to be rather hard on the horn until one day it got stuck on whilst he was driving, caught the attention of the guy in front who, thinking that the horn was directed at him, gave my colleague a good wallop.

So I imagine curing your horn issue will ensure that you don't find yourself in a similar position - which is a good thing.

On the flipside, if you hadn't fixed it, I wonder if it would have given 5 toots as you went astern?