The reason why I locked it is similar to why the gun topic got locked: Eventually, there's a point when it just becomes clear that things are starting to go too far. It's not about super-strictly following some terms of service agreement, that's not how moderation works; there's a point at which discretion must be applied, and in this case, I'm the one in the situation to have to apply it. It's true, we didn't exactly have a screaming flamewar in there. But it was still very clear that things were going south fast. Heck, when the Ignore button comes out.... that's ALWAYS a sign of something gone wrong. I hate to think that ANYONE here should ever really feel the need to ignore anyone else. Honestly I feel like I've screwed up somehow anytime that should ever happen.
Hopefully nobody here is TOO bothered by the locking. Frankly, I should have spotted the signs earlier than I did and locked it sooner, to be honest. I apologize for the fact that any of it went like this at all, everyone.