Hello,
I thank to all for the replies, and must admit that I was overstrained with the situation on the spot. I have heard many comments about my size in many Asian Countries, but being titled a "Mister Bean" was not a glory for me (at this moment), because I simply don't like him and was not aware that he is beloved in Asia (although I passed at least one year of my life in Asian Countries..).
I decided now to make the step this evening and will go and apologize for my overreaction (but without bringing any pictures...).
Be reassured: If it was my intention to accost somebody, I would not have written about here afterwards. And I am reassured as well that it was not the intention of the waitress for accosting me.