I support this for a very important, overlooked reason:

If you forward an email now, the personalized unsubscribe/manage subscription links (for the subscriber who forwards the email) will be included. WE'VE HAD SUBSCRIBERS FORWARD EMAILS ONLY TO HAVE THEIR FRIENDS THEN UNSUBSCRIBE THEM FROM OUR LIST.

The forwarding option should clean out the subscription links.

FYI - MAILCHIMP and other major newsletter providers include this as a standard.

I don't like this. I think you should just forward the email to your friend and let them know where to go to sign up. I don't want people signing me up for emails. I get enough junk email the way it is!

Don't need to making the plugin bloated while the plugin is capable to do the work. You can simply make a list and add your friend's email and name on the list then create a comapaing nad run this campaign listing that list. This is currently possible.