I bought my Supes from the local comic shop who had him on display on the flight stand. They had him posed with the arm flexed at the elbow. When I was checking it out the material stuck together between the bicep and forearm. There was no damage, but they had just put him out.
Due to this I had very strong reservations about the materials used for these suits. The reports of damage are not suprising. I think the flight stands are asking for trouble on these suits, and thus why I have ZERO interest in the Suicide Squad Batman. I refuse to use the Superman flight stand, and went with almost musuem poses for these figures. Very vanilla. Rubber tends to react very poorly with plastic surfaces. I would not recommend using waist grabber stands with these, even with their foam padded pincers. Hot Toys just does not seem to do any tests to check the stability of the rubber they use.
I agree on flight stands. I damaged my MOS this way and have never used a waist grabber on the BvS version for that reason. The CR Superman is fine with the waist grabber though. It's just these rubbery suits that are sadly effected.
Don't quite understand having zero interest in the SS Batman. I have no interest because I'm happy with my BvS version. But for those that want it why let the flight stand put you off? Easy to use a different stand. A plain stand can be found for peanuts or spend a bit more to get a good custom or a BvS stand off eBay.