What should named scopes do when the scope *name* is bound to an input value

[rafaelw]

Moved from: googlearchive/TemplateBinding#109

i.e.

<template repeat="{{ user in users }}">
   <input value="{{ user }}">
</template>

Seems like the two choices are

1. Up the element position in the iterated Array. This seems scary, as it will destroy the instance and create a new one

2. Issue a warning.

[jmesserly]

agree option 1 is scary ... it also wouldn't work if there was a filter involved
would option 2 mean a console.warn? that seems reasonable.