Action 'Content is being viewed' and access denied

I'm trying to set up a rule the handle the situation where a user tries to view some content that they are not allowed to (private OG content in a group that they are not a member of). I'm finding that the 'Content is being viewed' action is not being triggered in this case, and I can't find another suitable event to handle this. My assumption is that it's because access is being denied by OG in hook_node_access, which runs first and issues a 403 before rules executes this event.

1) Is my assumption correct?
2) Is there a rules event trigger that can intercept these 403s?
3) If not, is it a feature that could/would be added to Rules?

Thanks