Here's one we did targeted to our (customer support) audience: "Please type your reply above this line" (http://blog.reamaze.com/2015/04/01/please-type-your-re

Here's one we did targeted to our (customer support) audience: "Please type your reply above this line" (http://blog.reamaze.com/2015/04/01/please-type-your-reply-above-this-line/ http://blog.reamaze.com/2015/04/01/please-type-your-reply-ab...)