If you find it too troublesome to change into something other than shorts and tank tops for the dining room for breakfast and lunch you can still eat well in the ship's casual dining venue. I agree that it "is your vacation" but I also know human nature. If you lower a standard, some people will still feel they are being restricted. On one cruise, there was a woman who regularly wandered the halls in her PJs and bunny slippers with a cigarette dangling from her lips and big pinck curlers in her hair! Yes, she has a right to be "free" but the other pax have rights too, and one of them is not having to see other pax in various forms of undress. On another cruise, two guys showed up for dinner wearing musclemen shirts and really tight short shorts (ok ok, maybe looking at them was not so awful -- hee hee) but they were turned away and most passengers agreed rightly so.