intertwingly

My comment system is based on a number of regular expressions which seem to work tolerably well in most instances when coupled with a preview function.  Unfortunately, the results are not quite as good  when used in a API context.  So, today, I finally did something about it. 

The way it works is as follows:

• If your content is marked as well formed XML (either xhtml:body or atom:content[@mode='xml']), then a simple scan is done for objectionable tags.  If there are any such tags, the entire request is rejected.  Otherwise, the request is posted as is.
• If all I find is escaped content, I'll continue to support that as I always have - with the regular expressions that mostly work.  Kinda.