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My position is that application programs should not impose restrictions that are not enforced by the OS. Full stop.
And for portability reasons, applications should not attempt to "validate" file or pathnames. Let the OS do it and then reports its conclusions.
Any other approach is just pointless make work; and will inevitably comes back to bite you in the ass.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.