This topics discusses the pros and cons of disabling HTML in TWiki topics.

If you were expecting something else, see RequireEXPLICITTagToEnableHTML

My comment:

This would be a terrible, disastrous idea. If any one thing would stop me (or, I believe, a lot of people) from using TWiki, this would be that one thing. Please Do NOT even consider this seriously. Ever. Thank you.

-- VickiBrown - 11 Nov 2004M