Put yourself in my shoes for a minute.
If I send out 65% of 3,500 coins (2,275) and 10% of the coins go to the wrong address, someone they shouldn't have gone to, etc. I've just made a $2,750 mistake and am still liable.
Does that sound like fun to you?
Nope, fun is long gone.
Maybe the payout problem can be solved by using a php script that verifies a payout of 0.01% -> user agree -> send 99.99%
But this is not the real problem.