I really don't know why everyone is so concerned with a 30.07 sign meeting the exact requirements of the law. If you see a invalid sign, you still know they don't want you to carry on their property. If you decide to open carry anyway, they will just tell you to leave.
As a lifelong supporter and defender of private property rights, I have to say
YES! The kind of people who use verbiage/color/contrast/size of signs to decide if they will intentionally ignore the wishes of the owner of private property - are the same people who think that "No Trespassing - Private Property" signs don't apply to them, and will say things like "Hey, it wasn't locked...."
It really is very simple when discussing open carry: Either you respect private property or you don't.
FWIW, I own a small business and I will NOT post either sign.
Marc