I'm not sure I follow your logic here, micro-formats are part of the HTML of the local businesses website, search engines and other crawlers can collect and parse this data . This is just like the local business owner telling the rest of the world which is the correct data.

If updating the HTML is too complicated for the website owner (fair enough!) then this should be taken care of in the respective CMS.

I don't mean to sound negative, I know It takes some thought and time to put out a proposal like this :-) Just in this case, this seems to be a problem that was solved a long time ago...

http://support.google.com/webmasters/bin/answer.py?hl=en&...