There is nothing wrong with a quick horn signal to let someone know they are in your lane or that the line turned green and it’s time to go.
But leaning on the steering wheel for 5-10 seconds while being stuck in traffic is annoying, stupid, and so damn selfish. It disrupts everyone around for no good reason.
This is something you have to deal with every day downtown between 3 pm and the 8 pm curfew. Somehow, this disgusting behavior has become socially acceptable.