Paul Graham on methods of bypassing spam filters
And of course, spams won’t work so well if they have to be rewritten in more neutral language. People who respond to spams are presumably pretty dull-witted, and have to be hit over the head with a lot of capital letters and exclamation points to get them to do anything. Perhaps you can’t get them to act at all unless you tell them they have to ACT NOW! So forcing spammers to use more neutral language may be enough to put most of them out of business. We’ll see in the coming year.