Filters to catch junk form submissions?

[Ari_Echt1]

Anyone have any smart list filters to catch junk form submissions that they'd be willing to share? 

Thanks in advance.
 

[Josh_Hill13]

I usually go through the various junk leads and take those cues as filters. It won't capture everyone.

asdf
qwerty
aaaa
sssss
none
na
no one