This sounds like a good and well-needed change. However, I think it might have been implemented slightly differently. In my experience, negative options eventually lead to confusion. Couldn't the option have been left as "Filter HTML...", and the default be checked on?

There are several other options that should be reversed in sense, and become:

• Forced Preview
• Hints On
• Enable full JavaScript on homenodes
• Navigation menu under title bar
• April Foolery

This avoids having awkward questions like "Did you turn off 'Turn Hints Off'?", or, "Did you enable 'disable some javascript?'".