How do you get people to protect themselves from something they don't believe in?

I just got done watching The Blob from 1958 which is the first film appearance for McQueen and also Aneta Corsuat who in my opinion is very pretty in this film. It has pretty much the same plot line as any other science fiction film of the 1950's. Something lands and a monster comes out one or two people see it. Then they go tell the police and they think that they our crazy. They then try to tell other people but know one believes them. Finally after 7 or 8 victim's later the thing is seen by many people including the police. After they use guns on it and that does not work so they use something else but by that time one more person is dead and the monster is tearing apart a building. Then they shoot some kind of weapon or fire or water at the monster and it dies. THE END. The Blob has Steve McQueen which makes it better then most 50's Science fiction. Next we will watch Steve along with James Garner,James Coburn,Charles Bronson and many other great actors as they try to break free from Prison.