"Bad behavior is going happen anyway so we should allow researchers to act badly in order to study it" I don't have the time to fully explain why this is wrong

"Bad behavior is going happen anyway so we should allow researchers to act badly in order to study it" I don't have the time to fully explain why this is wrong if someone can't see it. But let just mention that if the public is going to both trust and fund scientific research, they have should expect researchers to be good people. One researcher acting unethically is going sabotage the ability of other researchers to recruit test subjects etc.