What do those reading this think a fair tip is for a bag? Aside from the fee one pays to the airline, airport or whoever, what is the additional amount one should be expected to give for safe, careful, friendly service for your bags?

Is it less curbside and more if your stuff is trucked inside for check-in?

$1/bag is reasonable I think. Less is just not practical, more than $3/bag I think is overtipping. I am not one who buys into the next statement much, but when I was reading this, I was thinking, maybe we have conditioned skycaps to expect a higher tip.

I believing in paying for service and conveinence, and tipping for appropriate service. I tip the barber, the bartender, the waitron, the cab and car drivers, even the skycap, as necessary. I don't tip the coffee barista, the sandwich maker at the deli, or hertz bus driver. Double standard?