The Flat Earth Theory? Falsified. Not just modified, falsified. Many men went against the power structures of the time in an attempt to spread the word about their discovery and ended up going to prison or, worse. It took hundreds of years for brave thought leaders to embrace the idea of a round globe, and many brave explorers finally proved it. Does Ferdinand Magellan ring a bell?
Pseudo-science is what you're talking about. It has no place in rational decision-making. As soon as an observation is found which does not support the hypothesis (or theory), One must be forced to reconsider the validity of that theory (or hypothesis).
The only difference between a hypothesis and a theory is the level of acceptance. Theories are more universally accepted.