Thought-policing is their deal, you don't have to engage with them if you've no intention of persuading them with the fruits of freedom and democracy. They're just using it as a schtick to cover their personal issues and are best ignored if you've nothing nice to say. Anything else will only vindicate them in their messed up logic and worldview. They want to struggle, feed on it and are subject to the same forum rules as everyone else. They don't last very long.