Thought so. Here are my thoughts on the matter.
Yes there is the possibility of something happening that could be misconstrued by the drive by media. As the saying goes poop happens.
Someone could have an equipment malfunction that woudl be embarrassing (such as a loose holster that allows the firearm to fall-out).
Some do-gooder hand-wringing soccer mom can come by and being woefully ignorant of the law call the police for a MWAG. After all those nasty ol guns can jump out of their holsters by themselves and shoot someone without provocation.
We could have another ********* come up and start an argument or act in a hostile manner - now you have a confrontation between a group of armed men and an innocent bystander according to the drive by media.
You could have a group petition to restrict firearms possession in a public place, or the park developing a new rule to restrict the same. They can take it a step further and encourage their legislator to address this legally.
And of course the sky could fall, the Rapture could happen, and the Russians could invade using paratroopers coming up from Messyco a la Red Dawn.
So yes, negative things can happen.
Now, positive things that can happen:
The news media comes out and films a group of OC proponents having a BBQ in a park somewhere. The news media might even interview some of the attendees. This has been demonstrated by the OC rally at Ft. Hunt on Patriot's Day last month and the massive positive news media response generated from that event.
If we can make it, my wife and daughter will be there. How much great propaganda could we get if the media filmed/interviewed me and my wife OCing with my blonde haired blue eyed cutie holding our hands?
Other park patrons nearby may come over and express interest which would allow us to hand them a LOCAL pamphlet explaining the legality of OC.
We all get together, have some good grub and enjoy the camaraderie of other armed men and women.
When Mark does not show up and decides to pull his normal bitch fest, we will have another reason to point out his uselessness and counterproductive ways.
So yes, positive things can happen from this event as well. I understand the what-if game and it's a wise thing to do. We must be as thorough with our rules of engagement and our prep work for the event. We have to make sure all I's are dotted and all T's are crossed. If that can happen then I think the event could be a success. Of course that's contingent on all the details being ironed out.