I see alot of those banner type ads as well as large rectangle ads that have a huge whitespace and then large text. Sometimes I mistakingly click the white space thinking it is part of the page but it is instead part of the larger ad. Not only is this annoying, but for adwords users it results in excess mistake clicks that dont convert. Im sure tons of people click the whitespace to relayer the browser windows (not using firefox tab browsing) and accidentally click an ad. Thought on this?