Very possibly - I've not been getting them for long, and have not found an archive.
The most recent mention in a newsletter is in v5.1 January 2003:
..> 3. Iprotect change!
..> Here's a sneaky little change I thought I would mention in case anyone
..> read this far. Today we changed the default status for Iprotect on new
..> domains from on to off.
Plus the product info at http://www.dreamhost.com/shared/flexible.html .
..> Sell membership access to a portion of your site? Protect it from
..> fraudulent use with our iProtect feature, included with all plans.