How to deal with haters?

I guess everybody has his hater comments under their vids, and need to decide what to do about it.

Ignoring is probably a good thing and even blocking if it gets crazy. Its probably a waste of time but i try to put them in place, and get some engagement in order to push my video due to increased activity. But question is if i can get into trouble if i escalate such conversations and they try to report you?