To be able to add multiple #'s to a contact simultaneously from a group text.

I get so many spam text in a group text format. I create a certain SPAM contact to add each number to so I can manage the future texts that come from those pyramid scam text chains that are essentially sharing numbers to which to send more spam.
Blacklists (blocklists) don't necessarily transfer if your phone dies or is reset.
Adding 10 to 15 individual numbers one by one is cumbersome and time consuming. It sees there could be a way to multiselect and and to a contact.