This has been mentioned before... here a text from "messiah or madman":

 FRANK NOTARO:

   Saturday, 5 Oct.'85: I went down to the Advanced Organization in
 Los Angeles to ask for a refund of monies paid for a level of auditing.
 My request was in writing.
   A security guard told me to get out or I would be arrested.
   "O.K.'I will have to picket," I said.
   The next day I picketed by myself in front of the entire Cedars of
 Lebanon ("Blue Building") Complex.
   One sign said "Ron is Xenu!"
  A Church of Scientology "Security Guard" came from the front and
 grabbed my signs, while three or four others jumped me from behind
 and threw me to the pavement in the middle of the street, where they
 pinned me down and handcuffed me from behind. They then took me
 inside the building across from the Advanced Organization.
  On the way I managed to shout to a friend to call the police, as I was
 afraid. I was held captive for an hour or so until the police came and
 released me.
  The police omcer told me I had every right to picket and escorted
me to safety.