victimless
adjective uk/ˈvɪk.tɪm.ləs/ us/ˈvɪk.təm.ləs/
（犯罪行为）没有受害人的，无人受害的
In a victimless crime no one suffers directly, sometimes because the people affected by the crime have agreed to take part in it.
Stock market fraud is sometimes regarded as a victimless crime. 股市欺诈有时被认为是没有受害人的犯罪。