Just came back from the Radiance - Hawaii cruise.
Saw the stateroom-attendant putting red cards in the doors after people left their cabin, where you usully use your stateroom card. That must have been a sign, that the cabin is empty. I think, they have controlled that, as well as the person on your musterstation, is checking your name and cabin number on a protocol.
But never heard about some consequences for those who not took part at the muster drill.
When we were on AOS last year, the stateroom attendants did go to each room and put red cards on the doors of empty cabins, and at the muster station, we did have to give our names and they checked to make sure we had our vests on correctly.
The good thing about AOS was that we had our drill *inside,* so we weren't in the hot sun. That being said, though, the lounge was more than stuffy, especially when you consider we were wearing the life vests.
We cruised Grandeur of the Seas from Tampa in March and the Muster Drill was long, primairly because a few people took their time getting to their stations and held everybody else up. A couple of older people got to our muster station early, and were standing for about 45 minutes total. They were tired by the end of the drill.
If you have a health problem, contact RCL if there are any special considerations for handicap people (i.e. different muster station w/ chairs, etc...) I don't know if they can accomidate that or not, but I would check.
RCL had us standing outside for their drill. Last summer we took Princess and were seated in the lounge with Air Conditioning. Two years ago, we took Carinival out of Tampa and they also had us sitting inside, in air conditioning. Perhaps if enough people complained to them, they could change where their muster stations are.
As soon as the muster drill is done, the party begins!!!
Like others have said here, we too know this is a necessity. We have cruised the Serenade, Vision, and Rhapsody, and each time we have been required to check in at our station. We have learned, however, to get there in a timely manner, but not necessarily at the first minute. When you arrive a wee bit later, you don't end up at the back of the group close to the outside wall of the ship. It can be somewhat claustrophobic at the back. On our first Caribbean cruise, it was so hot and humid that an elderly couple had to be escorted off.
Go to muster; get there in a timely manner; be a bit patient, and truly enjoy the rest of the fun onboard! :-)