I'm not a Rails guy, so you'll have to forgive ignorance here. Are you telling me that Rails only lets you blacklist parameters, not whitelist?

Because that seems entirely the wrong way around.

EDIT: looked at the link posted elsewhere here[1] and ound that it is possible to whitelist using "attr_accessible". Please tell me people know about and use this.

[1] http://guides.rubyonrails.org/security.html#mass-assignment