That it's difficult to do this right is not an argument for doing it poorly. My point is that it'll have a negative effect on net if implemented without thread-moving, with the correct goal of discouraging bad conversations getting obscured by the problem I've pointed out. Only if the problem is mitigated (by thread-moving or something else) will it be a good idea to implement what you suggest. If it can't be mitigated with available resources, then nothing more should be done for now.