For our team: This applies (at least) to Tags, Sequences and Campaigns in the Contact Record, where you can quickly and irreversibly click the little X next to the item and it is gone very quickly. There is no confirmation prompt to prevent it or way to restore it without remembering what you deleted. Where clients might have a dozen tags all starting with "18:Spring Munchen::Prospect::" it can be hard to restore one clicked inadvertently.