Cool, anything will help. I am currently doing adult site, only really cause I am new. I really want to go mainstream. I need this cause of all the cheaters. Its crazy how many of them there are. I DO KNOW must are honest........
Also note that your meta keywords have essentially zero impact on your page's search ranking: it's the actual content along with the number of links to it from "quality" pages that are going to determine your ranking.
"Please give us a simple answer, so that we don't have to think, because if we think, we might find answers that don't fit the way we want the world to be."
~ Terry Pratchett in Nation
I disagree NogDog on the idea that meta tags keywords don't make a difference in SEO. Sure there are other ways as well to rank up- content, title, img alt tags... But the meta tags do make a huge different in search ranking- I work for an ecommerce company and we try everything to see what helps the ranking. Google doesn't use keywords, but the rest do. Google does use meta description.
I heard there's a way to hide to the hide keywords using ASP? Does anyone know anything about that?
If you really want to go to the trouble you can serve different versions of the page depending on user-agent (server side programming). But that won't solve your "problem" of hiding content because the "cheaters" can fake their user agent and appear to be a known search engine spider.
Get over it. If you don't want something seen, don't put it in the page and live with the possible consequences.