That's the content they choose to sponsor (with a soapbox), and which they should curate.
Lambda is pretty solidly about functional programming. Maybe extending to programming/admin in general but not to politics.
Speakers should always be tweaking their talk for the audience anyways to handle different durations, venues, crowds, time of day, etc. If there's anything you don't want you can fix it here.
I'm absolutely within my legal right to call the police on anyone who I kick out for anything other than a tiny list of protected reasons, and I do so. (Very rarely, almost everyone leaves immediately when you show that you aren't playing some rules-lawyering game but simply calling the police.)
Both as someone familiar with human behavior and as someone who's gotten legal advice, a code of conduct never helps me or the good attendees. It only offers refuge for the spoilers.