So I heard all the people found guilty by verdict of the court of being sex offenders get attacked by gangs

Why don't all those people who are charged with being sex offenders form their own gang to beat up anyone who attacks members of their gang to put a stop to other gangs attacking people being charged with being sex offenders

I say found guilty of being sex offenders because a large proportion of people found guilty of being sex offenders did not commit the crime they are changed with