The attendants would probably look to an elder for permission to remove him.
I don't know about overseas, but in Australia they can't remove you from meetings cos if they touch you then that is considered assault. Before last convention JW's were instructed REPEATEDLY not to touch anyone who caused trouble at meetings/conventions but instead to surround the person(s) and call the police. The speaker doing the talk in the service meeting virtually yelled the "do not" part.
PS In the 40's there was a convention in Adelaide and "apostates" rushed the stage and as they rushed the stage a J.W. KINGHIT (yes, KINGHIT!!) one of the stage-rushers.
PPS They can't remove you if you don't cause trouble cos a church is considered public space.
From The Apostle AK