If you meet a new person and want to exchange messages, there's not a huge difference between adding them in your messaging app and adding them to your contact

If you meet a new person and want to exchange messages, there's not a huge difference between adding them in your messaging app and adding them to your contact list. Using this model it would better to have multiple lists though, or at least tagging within the general contacts list, so tag-based lists could be allowed by certain apps (to keep business and personal messaging separate for example).