Rabbit starts are awesome, and THE way to go when you've got a small crowd or you're starting folks casually without an RC. The only disadvantage is that they do require a fair bit of boathandling skill until you get the hang of them. I think that's a pretty killer way to work on your singlehanded starting skills (you can set up far away from other boats if you're not comfortable at first) and they'll get folks lined up for a beat nice and evenly.