Halfway through class my hakama started to fall down
Next time I must remember to tie the tapes much tighter, as they do slacken off once I start moving
I don't know how you tie yours, but in my dojo some (not all) people have a slightly different style. I had the same problem with my hakama falling down halfway through, but using this style makes it stay up no problem. Saves me a lot of embarrassment.
Basically, fold the front part down the inside, wrapping it over your belt. The front straps will have to be threaded through as well, but that's quickly done.
Generally, nobody notices any difference, save your pants don't show and you might not trip as much.