I believe the greatest use of splitting 2/2, 3/3 and 7/7 vs 8 comes with a minimum bet out at a near neutral count. The loss in hand EV (shoe game) ranges from 1.0% to 1.5%. This means if you have a $25 bet up and split any of these, you'll be spending about 30 cents out of your advertising budget. It's a very cheap way to look like you're making a very stupid play. That's what camo is all about. The scenario should play out something like this:
You look at the player next to you and ask, "Are you supposed to split these?" He replies, "No way! Why make two 17's against her 18?" Then you ask the dealer, who summons the floor person. He consults his vest pocket chart and replies, "The book says just hit it." You come back with, "If the book says hit it -- then I'm splittin' em."