Adesanya, who had his jaw broken in 2012 when hit from behind, wants to bring attention to the lack of legal recognition of the seriousness of the "coward punch".
"I am distraught," he says. "My gym brother may die because of the gutless actions of these men.
"In the past decade, there have been numerous deaths from punches thrown when people are not looking. Given the massive publicity these crimes have received, no-one is dumb enough to think there is not a serious risk of death.
"There is no excuse, it should be considered attempted murder or murder."
City Kickboxing head coach Eugene Bareman can't understand why the issue hasn't been addressed sooner.