Last time I heard privacy is not something required for protecting individuals or class or anything like this; there are areas or spaces where must be private (i.e. bathrooms). 

This is because the listing contract is with the brokerage and not the agent so if you use two agents from the same brokerage the seller is still the one whose interests are being protected.

It's cheap and just adds an extra level of protection.4.

Put the house under an LLC as I want to rent out the house (to provide protection)3.

This is business and in business do what's best for you and protect your investment to the fullest.

However, a 10-second search on Google pulled up the following: https://oregonrealtors.org/protect/selling-tenant-occupied-homes/

We have a 12 page management contract that we've added our real experiences to over the years, with the intent of protecting both us AND the landlord.

We have a vested interest in protecting our clients assets and don't spend money frivolously. 

because tenants are a powerful lobby group and they can and do change the laws to protect themselves....

I have an option contract to protect me from the owner selling after I start renovations.