Stopping the market for 24/36/48 hours just to be sure there is no delaying auction seems a possibility. Who knows it might even speed up the process with less loads on the server.
This would work, but would affect everyone not just a portion of the market and generally seems like a more heavy handed solution
People should but not everyone does, especially if it's not copy/pasted for non-English speakers.
I honestly think this is the easiest, least invasive solution. I understand that it's only in English but it's better than nothing and would signal at least attention to the problem.