This won't end well. Liberals don't respect any boundaries, not to excuse it, but they don't see them, it's just the nature of the mental disorder. This type of disruption starts pushing out the boundaries of what is acceptable, and begins to spread to other susceptible liberals, and can escalate to violence quickly, so it needs to be addressed quickly. They need to be authoritatively told "No, stop that". If that doesn't work a strong show of force is required. The liberal needs to be shown strongly and clearly where the boundaries are. This needs to be established for the safety and health of the liberal and those around them. This is standard procedure for the treatment of people with mental health disorders.