If you believe that the platform is so broken that it shouldn't be used (and I'm not arguing against that, btw) then a more reasonable solution would be to only

If you believe that the platform is so broken that it shouldn't be used (and I'm not arguing against that, btw) then a more reasonable solution would be to only allow position-reducing trades. That would also reduce overall trading volume on their platform. Not that I expect them to do any of this, just pointing out that 'shut everything down' is not necessarily the best approach.