Robert Gorell at GrokDotCom links to an interesting study today about opt-in vs. opt-out forms. It seems the best way to get your customers to opt-in is to require them to specifically opt out. But, commenter Troy hits it on the head when he asks, how many know they’ve opted in. As noted a few days ago, spam is what your customers think it is. There’s nothing wrong with making your forms opt out. Just make sure you’re clear on what your customers are opting out of.