@both the discussion on Telegram was the same that resulted in the revert of the other mass-deletion of tags made in Veneto by Friendly_Ghost: the mass-deletion was unannounced and not discussed by itself, so any discussion on the reason of deletion might happen on the status quo pre-deletion. Then this other changeset was found and quickly unrelated people (to the previous discussion) agreed it was an incorrect deletion, for both the meaning and the methods.
@Friendly_Ghost during the original Telegram discussion you agreed to revert the other changeset on your own, but omitted to make known of this other mass-deletion changeset, that was simply discovered later.
@SekeRob that's a good suggestion to bring in the chat to the user who added the tags from the signs, so it's clear the measure is taken from the signs (as the user explained himself is how he added the values).