We were at the Pirate party and got down a little early to make sure we had a decent spot. A tall guy and his Ipad left his family behind and pushed (literally) his way in front of my 5 foot tall wife and our then 7 year old. After I kindly asked him to move, directed him out of the way of my family, he did it again and again. I finally put my weight into him and leaned him out and may have given him a candid finger gesture in his video.
Otherwise, we really havent had too much trouble on Dis cruises except for unruly kids. There was that time that my wife and I got hit on by another couple. It got awkward after an invite back to their room for drinks and ........