I agree with this. I think they have a different connotation of anti-social, but to be "trashy" in
America is completely unrelated to being anti-social. I agree that there probably isn't a suitable translation for trailer-trash becauseit is a very specific subculture to Americans with very specific connotations.
Likewise, antisocial sort of just means "shy" to many Americans.
Perhaps we should refer to them as "Possible
Jerry Springer guests" ;P