I'd say that you should have put in 10 litres just like you normally would.I queued for petrol today. I was 120 miles from home with 40 miles in the tank.
I suppose I could have just put in 10 litres or so to get me home, but I filled up. Does that make me selfish or sensible?
Instead, you filled up and added to the problem. Which there wasn't even one in the first place.
You panicked bought with all the others and created a shortage.