So I'm a Masshole

I'm probably a Masshole driver. I'm ok with that. I pay attention, I try to drive well and I'm a step 9 driver. But when people are driving - they are trying to get somewhere! It's not a parade!

Today I'm behind a person at a green light who isn't going at all. I beep just a little as a friendly reminder. nothing. beep again. nothing. finally I lay on the horn and after about a minute the person suddenly realizes perhaps they are the one being beeped at and oh yes there's been a green light for 4 minutes and moves. Granted I realize there are times we get distracted while driving, but I try to keep that to a minimum. How can someone sit at a green light for several minutes and have no clue it's green or that cars behind them are beeping (I wasn't the only one)??? Luckily it was a really long green.