I worked for an internet tracking company - and we did tons of work in AdWords world. The idiot who was training me had an advertiser who was paying $40 per click -- on some kind of lawsuit over a medicinal patch of some sort. The reason that I call him an idiot is because he didn't think that his client would be charged if he just copied the URL from the ads - and pasted to follow it. I caught him the very first time that he did it and told him that pasting the URL is the same as clicking a link - the browser doesn't really differentiate when going to an address.