You are the ones being lobbied. It is therefore up to you to decide to whom you give access. I make sure that, when you give that access, it is in the registry. Currently, I do not have the mandate to determine who has access. I could never manage your schedules or decide who has access to what.
Anyone who gets paid to lobby must register in the registry, and I don't feel it is within my mandate to make it possible for the average person, who does not get paid a lot of money, to communicate with you.