The QJ, if he check-raises here, the only player that would call is the smaller flush is it not? The smaller flush would likely be trapped, married and go all in, but it's not statistically likely that there will be a player with a smaller flush.

I agree that he needs to raise somewhere, else he doesn't no for certain where he stands, and he's missing bets. It's not entirely unsafe to bet the nuts in the first place, as most people aren't going to assume you really just bet the nuts, of course you'll have to change that habit up as you go.

I just think that a check raise, especially at a table with some inexperienced players is to strong of an action, and will scare out two pair and other possible callers.

If you are going to check raise, it seems to me you ought to wait until the turn or river, so that you're getting big bets in, rather than just the small bet if the table does fold up around you.