Leigh, please forgive me - I just noticed that my reply was addressed to your post, not to the original poster (ironraven). I meant to say that ironraven is over-reacting to this. I hadn't considered whether you are over-reacting or not, at all. Sorry about that.
My general point is that many cases of discrimination are transitory - a handbag policy may not be enforced often if at all. If the theater makes it their policy to prohibit handbags, they should do it for a good reason and do so consistently. No theater that I'm aware of does this though, and I don't think ironraven's theater is likely to do it if he goes back with his Jumbo to watch another movie. I do think that when someone does apply a policy you object to, its best to discuss it with that person or their manager, and not make more of the issue than what it appears to be. Threatening to sack a manager or cry discrimination doesn't really help anyone come to a reasonable conclusion. I don't think the basis for discrimination in this instance is related to race, creed, religion, etc etc, it is an inadequate and unenforceable policy on handbags, whoever carries them. In general I do not like to raise issues of discrimination unless the offense is repeatable and the impact is real. Otherwise we're left with the equivalent of that funny scene from The Holy Grail, where Dennis is creaming at King Arthur, "Come and see the violence inherent in the system. Help! Help! I'm being repressed!" ironraven watched his movie with his Jumbo pack - quite possibly the offense if there was one has already been corrected, by ironraven.