"...or poking your finger on his (or her) chest" they may well be wrong but they're able to consider that entry levels of not just assault; but battery upon an officer of the court - in fact people want to see oppression? Then start poking a female officer in the chest or push her on *her* ass...yeah, that would do it in the town I live in - though again, you can argue it all day long but that is an option they have access to likely especially in a tenuous crowd control environ involving people waving their arms about "skipping" up to cops on the backs of horses
For that matter, its against the law to sidle into a traveling military convoy on the freeway or public road unless you're authorized to do so, and not just to make a point. I think the "skipping" can be seen as an effort to lend brevity to a situation that others found less so. And some of them were on horseback with batons. You don't toss squeaky chew toys at K-9 units either no matter how cute the squeak is and for what?
For what will eventually be Americans and their inalienable rights to American Corporate Sports?
http://www.youtube.com/watch?v=N8GRwgIKVN8