Howard,
Instead of coding around a whole bunch of exceptions to compensate for deviations from the standard, perhaps an exceptions list that the moderator could use to flog the authors or to simply edit the post to conform may be beneficial.
After all, standards are only effective if followed.
Someone once said "the great thing about standards are that we have so many to choose from".
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.
