My friend I mentioned, who serves full-time at the castle, has told me in detail that the seating cards, and dr systems at each podium have detailed descriptions of a member or two of each party ie. female/ss=short sleeve orange/vegas spelled on front of shirt in sequin, color of hair, black reeboks, number in party, children ages, clothing, hair color etc. and all of those small computerized boards the cm's have around their necks in the dining rooms all communicate with each other throughout the parks, since this is where the walk out problem occurs most often(parks), and once you check in this description is in there for the day . PLUS, cameras are everywhere, watching everything.
If you dine, walk out, and even if it isnt linked to your room, they have sufficient evidence on your description to find you and remove you from disney property FOREVER. All front of house cm's are currently being educated on all of this so they can call security promptly(which all table service restaurants have plain clothes and full visual security strategically stationed to stop walk outs). Thus putting an end to people who walk out after consuming food.. This is a definite no/no in the new age of disney dinging , and the orange county sheriffs department will just eat that stuff up.... no pun intended...
I would just be careful... I have heard of horrid stories from my friends whom work there and the statements they have to fill out against guests who opt to do this as it is considered theft. Disney dances lightly around it and goes for permanent banishment from the park to keep it out of the news instead of an arrest in the papers.
As far as the cast member who may get the grautity anyway added to their pay check if the guest complains and then getting fired for it, or in trouble, it would take a total of 6-12 of these incidences in a 1-year period for the cm to get fired. I just checked with my friend and it all depends on the point system the union and the company agreed upon during contract negotiations. If a server cannot learn from that many points or warnings then they are helpless...So, it is highly unlikely they would be let go, unless they just dont care. An AVERAGE TIPPED SERVER AT wdw/orlando grosses over 50k/year, so i would think they would learn quickly to keep this position.
I would be frustrated too if a server didnt bring me water to take my meds. So, I understand your frustrations. If it happens again, remember there is a wonderful chilled water fountain in the waiting area between jiko and boma... good luck.