Are squeaky toys dangerous?

I have heard many options on the use of squeaky toys for puppies and dogs.
Many people think that squeaky toys should be avoided because they could
encourage hard biting in dogs. Whilst making a comparison, I've heard others
ask, 'Have you heard the noise a baby makes when crying'?!
I am of the opinion that dogs are slightly more intelligent than to think a
baby or a child screaming is a squeaky toy. They are self rewarding toys,
so probably not the best for most training situations but I don't think they
encourage biting puppies, babies, children or adults.
I would love to hear peoples opinions on this.
Tony Cruse