Visited the Andy Warhol exhibit for birthday treat which was spoiled by overaggressive young woman who said I was carrying an IPhone and photos were not allowed. I was not taking photos and did not intend to as I had read the signs forbidding it. She then started following me around and when I stopped to look into a glass topped case told me to stop leaning on it as I would break the glass and spoil the artifacts.. Unbelievable - I have visited many museums, in London, New York, Paris and even Phoenix several times and never had this happen. A party of noisy kids came through and I saw one touch an exhibit and guess what nada, nothing. Way to encourage attendance!