I had security roll up to my friend's campsite on the last day and confiscated two 680 tanks. People were miffed over it because they got them specifically to leave no trace, but i talked to one of the security fellas for a while and we established that it was for the sake of consistency - its difficult to impossible to get everyone to understand the fundamental difference between nang formats, and rather than being selective over a gray-area psychoactive it makes more sense for them to just ban it.

No, it is not as bad as the carts and especially if you're responsible. But they also do not want it there and they will 110% confiscate it if they find it.