I also saw that Mythbusters episode. But most of them looked fine to me. The problem is that in America there are no animal cruelty laws when it comes to arachnids, so they can easily squash thousands of G. Roseas or Curlies or whatever and they wouldn't get in trouble.
"We choose to do these things, not because they are easy, but because they are hard" - John F. Kennedy
Fidentia est ultimum potentiae
Vigilo
Confido