I don't know of any state that doesn't recognize that what you acquired prior to your wedding vows is yours and not marital property. What is subject to division is what was acquired after the wedding.
It is more dangerous to put property in someone else's name entirely in order to hide it. One would have to trust that person completely.
I liked the comment above about opening an account and funding it, then stop the funding the day you're married and open a new account. The other spouse could not touch the first account in a divorce action, only the funds in the second account.
Plus, if you use funds from the pre-marriage accounts for major purchases, it is easy to show that the property was acquired with non-marital funds, and the property itself is non-marital nor subject to equitable division in a divorce.
You are very very wrong. If you are going to hold out separate property, it MUST remain separate and never be used in the marriage. Once you use it to pay for something consumed in the marriage, it is community property.
Separate property is a very real concern where something like inheritance for children of a prior marriage, or if there is co-ownership of property with a third party who could be adversely affected if the property were to transfer to the spouse in the event of a death or divorce. Pre nuptuals and will and estate planning is the way to handle those situations. But if you are protecting separate property, it should both be known by the spouse, the rationale understood, and the principle and all income from the account must never enter the marriage spending. It's either separate, or it's not.