So if it's the kind of belt bag that weaves through your belt loops and is sewn on in the front, they'll reject it just because it doesn't have the clasp? The former seems more secure than the latter, but I don't want to waste time arguing with the TM while folks stream past me if I'm going to have to go back to the lockers anyway. I just really want to avoid the lockers as much as possible because I've heard that the lines are even slower and longer now because of social distancing. This will be our first visit to a theme park without strollers - woohoo! - and I want to be as free as possible.
Related question - if your kids are wearing the kinds of Hogwarts robes that have special wand pockets, can they wear them on the rides or do they have to store their robes and wands in a locker? This is really just a question about the HP rides, I would probably stash all HP purchases in a regular large paid locker when exploring other areas of the parks.