document updated 14 years ago, on Apr 10, 2010

There are several porposed instances where:

there's some change in technology/medicine/policy that results in improved safety
in response to that, people change their behavior to be more risky

And the net result is an increase or neutral change in risk.

NOTE: Most of these are not clearly proven, most have issues with the data or the interpretation of the data that make the examples less than clear.