The more you ignore them the more you would become vulnerable to their hate. It is better to find their weakness and then downgrade them infront of everyone. In today's time everyone has some kind of addiction. You can use that as a weapon to defend yourself rather ignoring them. No one is a saint in these times.
.You are correct; we should always target their flaws and exploit them. We are humans, and our actions are frequently both beneficial and detrimental. Obviously, we are not saints who always do the right thing; rather, we should address what causes our faults and find a method to correct them right away. People around us will always look for our problems, so we must either react or ignore them. In my opinion, I would just choose to ignore them since I don't have time for problems, and I have more useful things to accomplish with my precious time.