my last trip managed to not tip. Example arrived at kerbside check in at IND. The sign says fee $8, so I gave him my bag and he checked it in and then I gave him the money in change. He quickly reminded me it was $8 plus tip. I asked sorry but where does it say plus tip, he said it doesnt, "good then I paid the right amount" I said and walked off. It makes me sick how everyone expects a tip for doing what they are paid for and what you are often payting thorugh the nose for.