It has been wrong, the SteveForSmash account was part of the meme thread in which Harada was mad about in that tweet. iirc it wasn’t the ForSmash accounts’ faults, though; a random dude joined in, tagged Harada and Sakurai as part of an Infinity War meme, and no one noticed when the meme thread continued.
Personally I highly doubt they’re gonna ban characters over a minority of internet spammers, anyway; iirc Harada likes to troll, doesn’t really have influence on Smash outside of his characters that get represented, and they all have had to deal with spam and “umg they did this that means x is confirmed!!!” anyway.