http://qs1969.pair.com?node_id=206729


in reply to Re: Filtering potentially dangerous URI schemas in <a href="...">
in thread Filtering potentially dangerous URI schemas in <a href="...">

Link coloring may be an option, but you have to keep in mind that people are using different CSS themes, so this probably should be implemented as a CSS class rather than blunt <font color="#ff0000">.