Explicit reminder about preventDefault

[AlienKevin]

I really appreciate the work you put into this library and I find it very useful. However, I've encountered an extremely subtle bug due to the default of setting preventDefault to True. I later discovered that the library allows custom configuration of preventDefault. I saw an issue on this and understand your choice of the default values. But I think an explicit explanation about your design choice in the README and doc would clarify this question and help users avoid subtle bugs.