I guess I would say you should know when you're being lobbied or not, whether it's casual or not. You're going to say that a short encounter on the street is not a lobby, but if someone sort of pins you down and for 10 or 15 minutes explains their position, whether they ran into you in a restaurant or whether they're in your office, you would know that they're lobbying.
On February 9th, 2012. See this statement in context.