Look, children, if you can't be bothered to make your site completely functional in Netscape (or at least make it degrade semi-gracefully), if your shitty website then goes on to
crash Netscape, and/or if your shitty website takes fifteen minutes to load over dialup, I cannot be bothered to view it. Which is probably just as well, because you probably have no content there worth a shit anyway.
If you claim to be a "professional Web designer" and you don't even HAVE NETSCAPE ON YOUR MACHINE to check compatibility, you need to be dragged out into the street and beaten with a copy of HTML for Dummies, in which you are more likely than not encouraged to test your work on different browsers. Double if your clients' sites refuse to load in anything but IE5. Death if your clients' sites crash IE. Do you know how much business you might be costing your clients if you refuse to make sure their sites are completely usable in Netscape as well as IE? According to the stats for Chao Patties, about 14% of the site's viewers. Might not sound like much, but on a site that might get a few thousand hits a week, that's a few hundred potential customers your client has lost because of your ineptitude.
Nothing--and I mean,
nothing-- makes me hit my "back" button faster that one of those snotty little "your browser isn't good enough for me, you're not welcome here" blurbs (and yes, I have seen it in so many words). Excuse the fuck out of me for using Netscape 4.7, or, God forbid, Lynx.
This should be required reading for anyone who would call him or herself a Web designer. Go. Right now. Read it, initial it, and keep it taped right above your monitor.