When L. Peter Deutsch first added the file I/O operators to
Ghostscript (1992?), I submitted a security patch to disable them by
default, requiring you to use
-dUNSAFE to enable them. He accepted
the patch but reversed the logic, enabling them unless you provided
-dSAFER option. I no longer remember precisely how he handwaved
away my concerns in his email, but it doesn’t matter.
I was right then, and I’m still right.
(At the same time, I also submitted a patch to the crude
option to make it possible to extract the text correctly and
post-process it into a document that preserved formatting pretty well,
but he only accepted half of it, because he was concerned that adding
a Perl script to the base distribution would impair its
Markdown formatting and simple HTML accepted.
Sometimes you have to double-click to enter text in the form (interaction between Isso and Bootstrap?). Tab is more reliable.