Final answer:
Prostitution, smoking marijuana, and illegal gambling are considered victimless crimes by supporters of decriminalization.
Step-by-step explanation:
Supporters of decriminalization believe that prostitution, smoking marijuana, and illegal gambling are victimless crimes. These crimes are called victimless because they do not result in injury to any person other than the individual who engages in them.
Prostitution, smoking marijuana, and illegal gambling are considered victimless crimes by supporters of decriminalization.
However, it is important to note that there is ongoing debate about whether these actions truly have no negative impact on society.