I don't invest in coal seam gas/fracking gas, animal raising for slaughter (eg. cattle), gambling, alcohol, etc
each to his/her own
I watched a movie Gas Lands about fracking and immediately sold my SSN at 19 cents (now 2 cents) but held my CEL (who told me they we conventional gas but i suspected they were also unconventional) and got burned
so it can pay off (SSN) or you can reap your bad karma (CEL)