Either way, we get a poorly-defined behavior with edge cases that are
likely to surprise the user at different points of time. So we might
indeed grow such a capability, but it'll probably stay off by default.
I agree that sometimes it could be against the user's expectations.
But I also think that other times it is according to user's
expectations. Which tells me that this is a separate issue that needs
a separate knob; we shouldn't deterministically deduce what users want
in this respect from the fact that he/she loaded an existing tags
table. Moreover, it is quite possible that even when the mode is
turned on, users might want sometimes to load tags tables manually.