Details, details, details. That's why we hire attorneys, accountants, business advisers, etc. If we knew everything we would not need them. Its been nearly ten years ago when I formed my LLC and I was told then that I would not have to file tax returns and have not done so. To date I have not been questioned.
I believe the reason was because the LLC was not conducting business. I have other LLCs in Ohio and yes, I do have to file and pay state and federal taxes but these LLCs are conducting business. There is also the protection of a corporation from personal liabilities that would not be available if the bus was registered in an individual name.
My concern was if Adam's LLC starts conducting business and has a set of books then it may become necessary to file tax returns since the original reasons for establishing the LLC has changed.
If any other questions contact my Montana attorney, John Bennett, and he will give you the real reasons.