I personally don't see anything wrong with it, because one of Perl's biggest uses is to make things easier. I've used perl from bash before (and vice versa) many times in one form or another.

I would say that so long as you document anything out of the ordinary that you do (for yourself in 6 months, or for the next guy that has to maintain your code), it shouldnt bring a pox down on your family or anything :o