While I understand the frustration chair hogs cause, the more I think about the more i realize how difficult it would be for cruise staff to police the deck chairs. There are too many chairs on large ships to track which ones have been "reserved" and for how long.
I think all they really can do is ask that passengers be courteous to one another, something many (passengers) seem unable to do.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014