Unfortunately people forget they set their WikiTree preferences to receive various communications automatically, so when the volume of their incoming email overwhelms them they simply tag that requested item as spam, rather than logging into WikiTree to revise their preferences. Tagging requested email as spam is wrong, as that action is recorded by Gmail, Yahoo and the other providers, and if their systems receives a threshold number of spam reports they will begin tagging those communications as spam prior to forwarding the missive to the recipient, thus the arrival of alleged spam.
Tagging something as spam is serious business. That designation is for unsolicited junk.
Whenever we no longer want to receive email we subscribed to receive, we need to unsubscribe or change our preferences to terminate the agreed upon business relationship.