nothing stops other webmasters from reporting you. if you build pages for the engines your probably going to get banned soon enough.
http://www.google.com/webmasters/guidelines.html
Avoid tricks intended to improve search engine rankings. A good rule of thumb is whether you'd feel comfortable explaining what you've done to a website that competes with you. Another useful test is to ask, "Does this help my users? Would I do this if search engines didn't exist?"