WEP is easily crackable. Google cracking tools for WEP.... you'll probably have cracked the password 10 minutes later.
WPA is reasonably crackable if: The network was secured with a weak password or you have special GPU accellerated cracking tools. You need knowledge here to crack WPA. Instant tools..no brainer tools are not the norm for cracking WPA.
WPA2 when used with a 8+ Alpha,Numerical non dictionary passphrase is rather hard to crack. (probably impractical to crack) Installing a worm on the network is probably easier.
Why are you telling me lol? I know all of this. I think you quoted the wrong post.