'Forward to a friend' functionality within an app
Our events team has created a mobile app to be used for some of our strategic events. It's already integrated into our Marketo environment (tracking registrants, etc.). Once of features they want to provide is for that ability for a user to share a recipe for some of the gourmet meals that will be served at the events:

It would require a custom 'forward to a friend' capability. I would think once the emails are submitted, we would need to parse each email into it's own lead record (and de-dupe against existing ones, if existed), send out the email and then mark the lead (if new) as unsubscribed - just like Marketo does. Does that sound about right?
I'm thinking this is more work than what it's worth, but should we proceed with it, I just wanted to make sure I was on the right track from a development perspective.