The concept of designing around engagement is benign in a lot of instances, but it still strikes me as unnerving and, in a lot of contexts, unethical.

Imagine if our medication, food, etc were designed around engagement. We already have a term for that, and it's addiction.

I don't understand why we guard our physical intake from 'addiction', but don't show anywhere as much concern re: our cognitive intake despite our mind not mattering any less than our body.

This is obviously a concern that we as users should have, but I think some of the impetus lies on our designers as well.

http://itskrish.co (it's a work-in-progress)

This might help solve that dilemma: mailto.ninja

It basically takes you mailto links and makes them work like contact forms.