I have looked for this before also. It kinda irks me that you can make up variables in other name spaces even under use strict... I'm not aware of any solution though.

use strict;
use warnings;

$shouldnt::work::imo = "It does work.. *sigh*";
print "$shouldnt::work::imo\n";
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So if anyone has a way to make my example fail to work, I'd like to know it. In fact, this may be the exact same question (with a different example).