OK. So her crime is disrupting a bunch of jerks.
Sounds like she deserves a reward.
As the ole saying goes, there's a time and place for all things. What I object to is the farsical notion that she is being tried for laughing. Laughing isn't illegal. It's no more illegal than is walking, and when a person trespasses by walking on prohibited land, it's not the walking that is unlawful but the trespassing. In the case of the original post, the crime might very well be the distruption, but it's certainly not the form of disruption that constitutes the behavior as unlawful.
When a driver leads the police on a high speed chase, he might understandably be charged with felony evasion. The assertion that he was arrested for driving is absurd. Yes, it's illegal to drive as depicted in the example, yet it's highly misleading to argue that since that instance was an instance where he was driving illegally that he was arrested for driving. It's the evasion, not the form of it, that constitutes the behavior as wrongful.
Now to you. To make this easy for you, I'll stipulate that the crime is a disruption (since it might very well be that the disruption is unlawful), but an important distinction 'sounds' like it might have escaped you. Even if it's true she criminally disrupted a bunch of jerks, the purported fact that a bunch of jerks were disrupted plays no part in what constitutes the crime. In other words, the crime is not disrupting a bunch of jerks --even if it's true that she criminally disrupted a bunch of jerks. That a bunch of jerks might have been disrupted is incidental. What is unlawful (or so it appears to be) is the disruption in that venue.
Perhaps your ears need adjusting.