That's pretty much my train of thought as well. If it was known to be as simple as showing up and the DLT would rectify the situation, I could consider it. But I can see your scenario b coming into play as along with having to shell out for a new set of licenses because it was my fault for being a farang 555.
I will say though as I've been living in Thailand for over 12 years now I cannot think of one time when the address was ever looked at or even considered for anything.