I'd usually prefer this sort of thing to be private, but MarkK isn't the only one, so it's time for a PSA-style post.
First, RobertH is 100% spot on. Everyone read his first reply (post #3).
Second, there is a theme among some people in this forum that when we remove a post, it's because of the content or opinions shared. To make this clear, we do not moderate content unless it violates guidelines (which manage behavior, not content), goes down a political path (because it always leads to arguments = guideline violations), or if the information could lead to physical harm (e.g. any post giving medical advice which needs to come from your doctor). We are very consistent with this approach.
Third, I do apologize to MarkK and others who have found that their posts or threads have disappeared. No one likes that, especially when it's due to others' actions. "There is no intention to violate any CGs." We very much recognize that the OP and some other replies are in bounds in these cases. However, we have also been consistent that when a thread has gone off the rails, we will not spend more than a few minutes to cull a post or two or make a few edits to get it back in line. If it's off the rails, we will remove the thread. This is always how this has been. We do not have time to methodically go over each post to remove the vein that has taken a discussion along it's political path etc. Furthermore, methodical edits causes more work for moderators because it usually leads to complaints about what was edited and requests for changes, usually because they didn't understand the issue causing us to take time to explain what's happening in the thread. A single thread can literally take hours to handle. Just no. To all, do not underestimate the time it takes to deal with a thread that has gone off the rails.
Given what's going on in the world right now, I'd say we're doing a lot to retain threads for those that genuinely have tough questions regarding uncertainty around travel right now. If you're finding that a thread has been locked, it's because we already did spend time cleaning out that thread, and we're locking it to retain the very information that you're hoping we can have in this forum. I know that all you're seeing is a locked thread and it looks like there isn't a problem there. So, I understand when there is an assumption that the issue is the content because that's all that's left. Instead, please assume that the problem has been removed, what's left is acceptable (OK, we're not perfect), and it's closed to prevent further issues (because even though the problem has been removed, it frequently doesn't prevent those people involved from bringing it back up unless we lock it).
Finally, the current environment is making this forum very challenging to manage right now. We don't typically allow for politics in this forum, but we've always allowed mention of something political when it directly affects travel. Well, right now we have an intersection of political actions causing uncertainty in travel. We expect people to bring up these topics as people need answers and advice, and I especially want concerns to be reassured that, widely speaking, today's news will not significantly impact your travels and people should continue to do so. We also expect replies to such questions to focus on the travel aspect. Many replies are great, but too many inject their own political commentary or give outright political statements. We as a community need to be more vigilant about keeping politics out of our posts. I'm trying not to have a crazy heavy hand, but even the light references to show which side of the political divide you are on as you answer the question is serving to sew division between you and other forum members. I urge everyone to focus hard on travel and edit themselves. We will do our best to keep division out of our forum. That's what makes this a helpful place for all.