Thank you SEA333, for your thoughtful reply. I don't believe that we've ever thought the type of behavior I've described is ok, but I understand what you are saying and agree that it does appear that way. I'm sure defending myself here is kinda pointless, but I was having more of a visceral, momma bear type "my kid isn't that bad" reaction to other people's suggestions that he is...because he's a generally sweet boy with some serious behavior problems right now. And I know I'm the one that gave that impression to begin with... So how can I blame out?

I AM going to chew on the points you've made, it's a viewpoint I haven't considered.
Where we are at in this season of life is, since I can't get a control on our child's behavior despite vigilant parenting, parent / teacher conferences, doctors' appointments, time outs, consequences, turning the lock around on his bedroom door and ignoring hours of tantrumy pounding and screaming like a 2 year old, to keep my sanity I have to pick my battles. We would prefer he not poke people, but are also very grateful he isn't hitting them given the battles we are fighting. I don't want my kid to poke Mickey in Disney....I also don't want a well meaning parent to come up to us and reprimand us, because then, yes, it is easier to just not see characters. That's why I wanted to know what the reaction is, and to see if anyone could share a similar fear or experience.
I'll admit to taking offense at the instantaneous "why don't you try parenting" comments, just as I'm none too pleased with the "why don't you try shutting that kid up" looks I get when he's screaming his lungs out in public. We're parenting our butts off as well as we know how, to no (seeming) avail. But hey, public forums, right? It's frustrating when you've tried all that you can and it doesn't seem to be working.
We've considered not taking him to Disney this fall because of what we are dealing with. And given our not knowing how he'll behave, despite his being taught the best way we know how, if we DO end up going, I think we'll just skip the meet and greets. If you see me on line and he's throwing a full out fit, believe me, I'm not enjoying it either.
Anyway, bowing out now.