DW is a HS teacher and we took 24 HS seniors to London last year (there were 4 adult chaperones). This was a much different atmosphere than WDW with easy access to alcohol, big city, subway (the Tube !!) etc. But some groundrules were set (curfew, buddy system, no one leaves hotel after certain hour, spot checks, 1 problem and there sent home to parents on moms $$, etc) and we had a fantastic time with no trouble at all. Now these kids were all "good" kids, honor roll students who were really interested in the culture and education that came with this trip, not just a chnace to be away from home for easy trouble...this made it easier. DW had all these kids in class for a few years and knew them pretty well, so she was comfortable going with them.
I say as long as you feel the 2 "kids" are responsible to be alone at WDW and will abide by your rules......why not take them
I say as long as you feel the 2 "kids" are responsible to be alone at WDW and will abide by your rules......why not take them