A friend and I went to an indian place and got their hottest dish. We both kinda shrugged at it, and the waiters took offense and brought out raw onions slathered in hot sauce. Eating those helped, but it still wasn't really spicy, ya know? Neither of us are even the heat fanatics, habanero levels of hot are good enough, so maybe some places just do like 5s and hope nobody wants the 10s.