I set @ARGV in programs all the time. There's nothing sacred about it.
Me too (see e.g. Re^2: How would you do it? Re ARGV, fundamentally! in this very thread). Now that you mention it, perhaps even: 
{
    local @ARGV=shift;
    while (<>) { ... }
}

while (<>) { ... }

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In reply to Re^2: How would you do it? Re ARGV, fundamentally! by blazar
in thread How would you do it? Re ARGV, fundamentally! by blazar

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