It's because strict and warnings are meant to help in development and testing. Since you are using these other modules, they should compile properly. The easiest thing is to create a patch, apply it locally and submit it to the module's author.

On a side note, someone already suggested that I put StrictDisallow.pm on CPAN. I have no interest in it and anyone who wishes to do so is free to do so if they please. If anyone does, though, a shout out would be nice =P