I did some research on the subject via PETA's website but this is all I found:
Taking B-complex vitamins or eating brewer’s yeast daily (in tablets or powder) can keep you mosquito-bite free in the summer months. Oil of citronella and pennyroyal mint oil are both effective repellents when diluted with vodka or vegetable oil and dabbed onto the skin. Mosquitoes dislike fresh basil and pennyroyal so these can be usefully applied on porches and around the home.While these are helpful tips they still don't answer my questions. Now that I have my very own public forum I thought I'd use it to try and get some answers. No applause, please. My intentions are noble for I seek truth, not glory. This is in no way meant to offend animal rights activists. While I disagree with PETA's tactics I respect those that would choose not to harm any animal. I could never take that path. I find animals too delicious. Nothing warms my heart like a screaming lobster.