You are mistaken. 

$ perl -MScalar::Util=tainted -TE'say tainted($_) for glob "*"'
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glob is a source of external input when "*" is used. Same goes for readdir. 

$ perl -MScalar::Util=tainted -TE'opendir(my $dh, "."); say tainted($_
+) for readdir($dh)'
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In reply to Re^2: unlink taint by ikegami
in thread unlink taint by toniax

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