How does that regard manifest itself today? Admittedly very few new "Thundarr" products have been marketed in recent years (though a line of action figures was made), and it is not even available on DVD.
But there does seem to be a booming trade in vaguely fetish-istic images of Thundarr's female companion, Princess Ariel. One example is the painting at left, which was apparently done as a commission.
And a young woman has posted a series of similar photos of herself dressed as Princess Ariel at this link: http://www.flickr.com/photos/inglaterra/226722167/
Imagine the type of guy she's trying to attract like that....