One of the things that does concern me on my upcoming visit is the fact that tipping is a way of life in America. As one who comes from a country where IT IS NOT part of our culture could someone please outline what is expected. Do you tip a policeman if he gives you a speeding ticket? Does one give a tip to someone whos service is not good? I am sure there will be people out there in the Tripadvisor community who can offer some opinions on the subject. If a taxi charges you $20 does he then expect a tip on top of that? Why not just put the tip in the price like the government does with hidden taxes. I find it hard to get a grip on the thing. Where is the line drawn? Please.