I'm guessing you understand this basic concept. Freedom of speech is not an argument that is going to help you if you post threats against the life of the President.

When you go to a function like this, there are generally rules set up to allow as many people as possible to have the opportunity to ask their own questions. Naturally, not everyone is going to get that chance, but without basic ground rules, that number would be even larger. It's actually pretty simple. If you go to hear a guest speaker, and you have the chance to ask questions, be civil and mindful that there are others that want to ask questions.

If a person fails to adhere to these ground rules, they are going to be asked to leave. If they don't do so, well then they run the risk of being tasered by the police.