[trhway]

>The difference it that in Russia/USSR it was taken more seriously, became more formalized

in particular many tattoos serve the role similar to military insignia and one just isn't allowed (i.e. would be punished severely) to wear symbols or the number of it which doesn't match his/her position in the hierarchy (which is pretty firmly enforced multi-level developed one in the Russian prisons) or his/her history like number of prison terms served and severity of the crimes committed.