Yeah. Take Gimpy for example. Boozer anyone? lolWell said Mac 77. Personally some of the best players I ever played in Melee were using characters considered low tier, like Pichu/Bowser/Mewtwo. So tiers don't mean a **** thing to me. I just don't want the Brawl tournament scene ruined by 70% of the players using Metaknight or Marth because someone out there stated that they were top tier.
Tiers should by no means stop anyone from using who they like. If somone really enjoys a character and have talent, then there's nothing stopping them from being great. It's just that if they come face to face with someone equally motivated and talented using a character with an advantage over theirs, then they're gonna have a tougher time. But there's never a guaranteed win based on tiers.