I'm not sure there would be less mayhem if the products were only available to techs of some sort. I think the reverse would in fact be true, at least this way if someone breaks there computer then they have to take it to a tech.
When someone gets malware or something on there computer if they have to spend money to get it fixed they are going to put it off. If the software is avaliable thouhg, then a good number of them will manage to fix things themselves, leaving a smaller percentage to break things and call a tech.
I would say this also pushes the arguments on a need for greater useabaility, greater education in basic use, etc.
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Course my father (PHD Physics, Masters Math, etc, etc) had his nice system completely overrun when I went over there the other day (300+ hits in SS&D, 30+ more in AdAware, still didn't get it all). He was using the laptop instead, even cleaned it once himself, he hasn't taught my little brother how to clean up aftwer his crazy internet game installs yet. So I think this means that if the software wasn't even generally available the situation would be even worse.
</offtopic>
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Help, the rampaging, spear-waving, rabid network gnomes are after me!