Re: many packages write to `temporary-file-directory' insecurely

[Richard Stallman]

    And we should probably impose a limit of, say, 50 scores, and 200
    characters in a score line.

Please avoid arbitrary limits such as those.  The GNU coding standards
say we should avoid arbitrary limits whenever possible.

Other than that, it sounds like a good solution except that it should
be more general, not limited to Emacs alone.