When a person does something bad，things can take a nasty turn。instead of being forgiven and forgotten，the incident can blow up into some

说明：

Take a turn经历了不寻常的变化，nasty感到难过，也经历了下流的变化。

Instead of.相反，

Be forgiven被原谅了

Be forgotten被遗忘了

在Incident上发生的事件

Blow up into sth被夸大或放大

Ruin sb's life毁了某人的生活

when something with even a hint of controversy crops up online，it has the potential to spread like wild fire . it ' s hard to control，AP

说明：

A hint of controversy有点争议

克罗夫业(特别是意想不到的)出现和发生。

Potential潜力、可能性

Spread like wildfire像野火一样蔓延

Never end well不会以好结果结束

public shaming has gotten to the point where the online " defenders " of justice are actually becoming bullies themselves。

说明：

公开羞辱Public shaming(意思是在网络上攻击某人)

Has gotten to a point where.达到了一个水平.

维护正义的人Defender of justice

Bully恶霸，流氓