You thought it was bad in 06!
Oh I am so glad someone found this thread!  You thought soliciting was bad back then...how about now?
 
Today, I had 3 calls within 15 minutes while I was trying to wait on a customer.  We are mostly a 2 woman shop so I am usually here by myself.
 
We too have a sign which does NO good.  I usually look the solicitor right in the eye and say, I am not interested.  If they keep on, then I say, "I am not interested but thanks for stopping by. You have a great day!"
 
I do that on the phone too.  I try to be very polite and say that I am not interested and thank you for calling.
 
There are times that I am a little rude.  Like when TF calls and says I need another web-site in addition to the one I have.  If I get one more call like that, I am going to ask "them" how many web-sites does Teleflora have that is for the public?