[hummusx]

It does follow logically that if you know someone is pushing with a larger range of hands than average, you can actually loosen up your calling standards. However, if you are 5 handed and are able to steal blinds frequently by pushing, does it really matter that someone else is doing it as well? Why bother risking all your chips on a questionable call instead of folding and just pushing the next opportunity to get them back? If you think they are doing it because they have a clue (as opposed to being a complete donk and just lucky to be doing the right thing), then you can probably reasonably guess that they don't want to CALL and all-in any more than you do.

This follows through all the way down to HU play. You won't be playing terribly if you push every single hand HU, but fold most of the hands when he pushes.