Sounds like I'm in the minority but I would never leave my kids unattended in a hotel room by themselves. But then again I wouldn't be in that position because I would never choose to go on a family vacation and then dump the kids so I could go to dinner alone. Different strokes for different folks.
i wouldn't call allowing one's preteen kids to hang out together in a WDW resort room "dumping" them

a lot depends on the child(ren) tho, some kids shouldn't be left in their own bedroom alone.
i think allowing fairly mature 12 and 9yos to stay together in a locked resort room, with a direct connection to you via cel phone, notes on where you will be, and instructions (what they are/aren't allowed to do, how to use room phone, etc) is fine.
btw, both DH and i have always been heavily involved in our kids' lives (preschool/PTA boards, classmom, coach, volunteering from 6 months old, etc) - so no parental slacking

we gave them structure, trust, and direction during their lives, and had no problem allowing them to stay in our WDW resort while DH & i went to dinner for 2 hours. it wound up being an excellent decision: they felt they had earned our trust, and had a fantastic time just being with one another (apparently, they had long conversations, played games, and came to appreciate one another as people - that's hard when there are each one's friends, family, around).
i agree with PPs that the restaurant should be close, like in the same resort.
kids can't grow up if you tie them up - trusting them when you know you can, and allowing them a little bit of freedom based on that trust will help them grow into more emotionally healthy teens
