Attacking someone’s expression of emotion is not an acceptable way to deal with them. If their goal of expressing said emotions is ultimately malicious, then it’s perfectly fine to remove them from a situation where they are not contributing. There’s ultimately a gray area, where you have to determine someone’s intention and make a call on whether they are trying to contribute or trying to disrupt.

To make matters more complicated, sometimes people are trying to contribute but end up disrupting and a judgement call may also need to be made here about whether one person’s contributions are helpful at that time and place, or whether removing the person from the situation is more helpful. An easy to understand example of this is a kid who wants to help an adult do something, like cooking, but may end up hurting themselves or causing a mess or compromising food safety. If you’re the parent of said kid, you might likely still let them participate because it’s a good learning experience. We should all strive to be like the parent, but sometimes we have other obligations and aren’t the only other person participating in an event and need to keep that in mind.