It seems to be coming through children only? I have seen that look and I know what you mean. I don't think it means that HaSatan is coming after you per se, but more like he knows you are a threat and will use those he can to quiet you. But don't fear, the L-RD will protect you, and he can't touch you unless allowed. It is fear that will tear you up so don't let it catch-hold. Just know that when you see this, it is a reaction, a reaction to the one who lives inside you, it is hatred towards that, not you. Be comforted in knowing that.
I would love to hear your testimony sometime and hear of your walk.
Don't be surprised to see this in someone, an adult that you believe is a true believer, a man or woman of G-d, because it can happen, I speak from experience.
Children are easy marks today, sad to say, but with the TV they watch, music they hear, video games they play, it opens them up to be easily possessed. Not to mention the messing with the food and drugs in the water, all makes for a dangerous cocktail.
Just be glad it was a child and not a full grown man. I hope that wasn't one of your family members, but even so, don't be fooled, it can happen from someone you least expect.