Cheap Engagement For Social Proofing Worth it?

I read that you can get alot of cheap engagement by the thousands for social proofing your ads by targeting cheap countries. http://www.upwordsem.com/how-to-hack-facebook-ads-down-to-0-005-per-engagement/

Would it be advisable to do so?

I also watched a video that cautioned against this saying that you might end up messing up your facebook pixel and harder to organically get engagement from your most important audiences. Some advice on how to prevent or reduce the negative impact on this would be great. Thanks