To Hug or not to Hug

It has come to my attention that the American Atheist Association are having trouble framing a hugging policy for their conference. Due to the fear of opportunists copping a free feel as one person put it or perhaps the descent into a welter of touchy feely, the committee are proposing a secular ‘noli me tangere’. How is one to express a modest level of approbation in a dignified manner? A standard greeting might be appropriate.
Greeting: Rational Beliefs
Response: Reasonably Held

This could be accompanied by a level salute, palm down from the chest representing the order and tranquillity of reason.

Alternatively when collecting name badges one could get a little decal of a teddy bear that signalled openness to a hug. One could have a crossed out bear to express disinclination.