Lawlz, good comeback Bob! : )
However think about this: if you’re that worried about spastics, and space everything out real far, you’re screwing over the screen mag users in some sense, unless the site is a very standard/common setup, right?
Same goes for Deaf-with-$lang-as-a-second-language, or site-$lang-as-a-second-language, or severe dyslexics: I cannot and will not create any site to cater to those people if it’s going to adversely affect a target group, or the general surfing population. So, same for spastics: If I were building a support-group site and forum for people with severe twitching and motor issues, sure, I’d be designing for them, but once it starts to compromise another user set that I can expect may visit, I have to decide not to do it.
Sometimes you can get away with simplifying text or the layout. Sometimes, though, you can’t. In which case, you have to decide whether your audience must meet certain requirements (this isn’t different from YouTube requiring that you have the Flash plugin and speakers to view their main purpose for existing, watch/listen to videos) in order to make use of the site or not.
And for that matter, if your target group has language issues (SL+, young children, dyslexics, whatever) then you may be making more use of something like Flash or JS for animation, sounds, or mouse-assists (I dunno what they’re called, they direct your mouse when you get in the general area of something clickable), which themselves may be barriers to other types of surfers.
Sometimes you can’t win for losing. So, if it’s a general web site for the general public, I make it logical, semantic, text-based (for the most part) and layer the other junk on top (CSS, JS) and let that take care of the majority of possible issues users may have. You can’t be all things to all people, but you can certainly lose plenty of hair trying.