There is no "precedent." We have a set of laws for challenging a candidate's qualification for office that have been around in many states almost since the founding of the nation. Oily Taitz has not properly followed those laws in challenging 0bama's qualifications. She is a flake and has no idea what she is doing, and she and her loony lawsuits will only hurt the cause in 2012 when someone legitimately attempts to challenge 0bama's qualifications using the proper legal procedures.
A future court challenge can simply point to the fact that everyone knew Barry was born a British subject...yet the country did nothing to stop it (or to "fix it" in place). Precedent set.
Couple that with the state run media, the overwhelmingly liberally educated sheeple in this country and hollywood, it's quite easy (now that we see it's been done before) to imagine that next time will be worse.