In a country (India) where two or three generations has grown up reading signs of Horn Ok Please and Blow Horn its not very surprising that people love honking.
Q: Can a blind man standing at a signal tell whether the light have turned green?
A: For sure ! This can be judged by the increase in number of honking sounds in surrouding area. You should note that the judgement is based on increment and not on 'existence' of the sound of horn.
Delhi has "No Horn Please" sign pasted at almost all traffic signals (I don't know about other cities). It is debatable that these signs are not visible many times. Inspite of this, Delhites would surely top the Most Horn(y) City contest by a good margin.
If you are behind a car, the car in front is not moving and you honk as soon as you see the signal turning green. It's probably induced by the fear that people fall asleep on steering while waiting for a 2 minute signal.
Being first in line (by leaving behind the zebra crossing and stop line for loosers) at at traffic signal doesn't marr some people's spirit of celebrating life by honking. These people are so habitual of honking on a green signal that they forget there is no one in front of them.
Are you are compulsive horn blower?