If a native Japanese boy, (15ish) applied the chikan ways of his home country here in the US, would he be labeled a pervert?

If a teen boy 15ish more or less, comes to the US and applies the chikan ways on commute trains and subways would he be labeled a pervert? Would it be taken into account that peeping up-skirt and groping women on mass transit, is seen by many in Japan, as just the way things are, or an exciting pursuit? Maybe he had relatives a part of, or he idolized the Chikan Tomo-No-Kai (“The Groper’s Brotherhood”). It is not like the group is littered with low-lives, there are doctors, government officials and the likes, represented. Some young impressionable boy comes here figuring he will get in some Western panty peeking and a grope here and there and if caught just pay a fine and have chikan boasting rights when he visits back home. Would he get labeled a predator or deviant and end up on a registry as long as he is in the US?