I'll probably end up doing this just because my son and I are sharing most meals. I'm not trying to specifically go and break the rules, but we are there 11 nights and I'm also not going to sit there and track how many times we shared with adult vs. kid credits.
If Disney wants to keep track then I am all for it - we would share adult credits and then we would order from the kids meals for our meals other times. That would work out just fine for me too. I just don't want to track it.
The table service seems to be different b/c I believe I've heard that it keeps track of adults vs children credits used or credits remaining for the party.
Now on the rare instance that we don't share (such as when he and my husband eat at pizza planet and I grab from somewhere else) then my husband will definitely order one adult menu item and one kids, b/c they won't be sharing.