Search Engine Clokaer does not create spam. You are simply personalizing your site for specific visitors -- search engine spiders. This is no different than the visitor customization that most sites do (even search engines)! If you've ever visited major Web sites, as you know, they track your visits, your information, and so on... when you return, they target particular content to you. This is all you are doing -- making your Web site customize to search engine spiders. As well, we never bombard the engines with content -- instead, they come to your site, and request content. It is entirely your prerogative what content you deliver to them.
That said, Search Engine Cloaker is controversial, and the search engines hate it! They dislike it so much, because so often it is effective at getting many listings. Here, the reward is high, and consequently the risk is high too. We're proud of the fact that out of over 1,000 customers, we know of only 2 that have been removed from the engines (one of them being our site after we heavily promoted our 60,000+ listings in Google