I have some very 'opinionated' relatives who post things of political nature that are so downright laughable, I almost think they are joking. But these otherwise intelligent wonderful people are beleiving certain things so I have found myself Snopesing them. I make no other comment other than to tell them to check Snopes for background on their article. I try to only do it to the most outrageous things that are, IMO, dangerously false and misleading, but they do soldier on. One relative went as far, when another relative very gently corrected some of the 'facts' stated in the article (he actually works for the place that was involved) and got blown up at for it, so I will be backing off. You hate to see people you care about putting these things up and possibly looking silly for it, but sometimes you just have to sit back and let them have their opinions.