http://en.wikipedia.org/wiki/Anti-pattern

I am not too sure about specific brands but, a good quality anti-slip rug would have rubber on the bottom to prevent slipping. Also, a good anti-slip rug would have a textured pattern underneath.

ANTI- was created in 1999.

Yes. They are also anti-werewolf, anti-vampire, anti-mermaid, anti-unicorn, anti-fairy, and anti-every other mythological, fictional, and delusional character and organization.

Anti race, Anti creed, Anti color and Anti religion all have ill effects on the world.