i guess i have seen so many old, stained, illegible, snaffle chewed or otherwise naturally destroyed summit registers that my viewpoint is is that these are not a good place to make the sole record of a first ascent if you really care about others knowing about it. and if you don't why bother to record it at all?
summit registers are by nature a transient, ephemeral resource. i have enjoyed finding a few and even reading through some long winded ones. but it does not bother me to hear that they have gone missing or been removed either. its in the nature of the game.