For a generation that is increasingly seeking validation, social media sometimes gives their confidence just the boost that they require. But, social media is not an easy beast to tame. Navigating through Twitter or Instagram is like walking on a land mine — you don't know when you might be subjected to trolling. Most celebrities have found themselves being trolled — be it over an innocent remark they made or a picture they shared. So, how do they combat the all-pervading villain? Engage in a war of words? Or, block them out? Here are a few, who've learnt to deal with trolls...