<?PHP
$a = "blah";
echo "$a";
echo "\n";
echo '$a';
?>
would return:
blah
$a
----
Anyway, not to parse (!N) content would be a good solution to avoid contact running random commands remotely.
Zero1: tell the contact to write (!IP) instead
much easier.
Anyway, I know that if I told someone to write '/run [whatever]' they'd do... so the problem would be solved but not completely. The social engineering would still exist (and newbies, too).
Not sure if that would help a lot