Social messaging promoted over basic safety

When you toot a horn you startle and momentarily distract every other driver or pedestrian in the vicinity. Hence Officially:

Using the horn

The horn should only be used as a reasonable traffic warning. It should not make an unnecessary or unreasonably loud, harsh or shrill noise.

 Maori Party co-leader Tariana Turia has suggested drivers should show their disapproval of others smoking in cars carrying children by tooting at them and wagging their finger like Supernanny scolding a child.

Some are so obsessed with the long-terms dangers smoking can cause that they have left their common-sense parked up somewhere.