I seriously hope you are kidding.
Not only is that unethical but HIGHLY ILLEGAL if you get caught. Killing animals not just game animals with an improvised bomb over a baited area is a good way to have Mr green jeans knocking on your door and have every firearm in your possession seized. Not to mention its not hunting.
I knew some "citidiots" in college who had the exact same plan.....except they video'd it on an iphone3. They filled 2 freon bottles full of tanerite and touched them off over 17 feral hogs....on private property....in central Texas then did 17 months in jail. They can not get a hunting license of any kind in this state now. They spent thousands of dollars getting both of their trucks back out of impound. Never got their guns back. And spent another 45k each not to have a felony on their record. They got caught by sending the video to another buddy across state who posted it on the then new public version of Facebook circa 2005ish. The guy who posted the video had ALL of the firearms seized from the house he lived in which just happened to be his parents home at the time....so yeah his dad's guns got seized for about 3 months also. Oh and their hunting licenses were revoked pending the investigation. Guy who posted the video rolled on the other 2 so his daddy could get his guns back. He didn't get charged with any crime because he wasn't physically involved but they missed an entire deer season. Which really sucks when you are paying 10k a year for a lease.
Shoot all feral hogs....just do it legally.