For the rule (?:\bhttp\/(?:0\.9|1\.)|<(?:html|meta)\b), any submitted data with the basic pattern...
...will trigger a positive result.
Based on the generality of the regex involved, I'm not sure there is a way around this issue, but here's the business use: in Magento, and likely in other Web apps with CMS or CMS apps, there is a field for adding miscellaneous content to the <head>. It
Please let me know if more information is needed or if I have missed any requirements necessary for this list.