jskrabac, I'd say around mid 200's-300's is decent weight...and around there is where you definitely would have issues holding it with shitty technique. It's now, when someone is using light weight, that they need to develop good habits.
sufiandy, nothing wrong with just using crossed grip...heaviest I've hit like that for front squats is 475, so obviously it can work. Maraudermeat also does heavy front squats with crossed grip...if you wanna develop the flexibility in your wrists to do them, go for it...but it isn't imperative or anything. Practice with an empty/lightly loaded bar (as in, 25's on each side maybe), and just practice a LOT.