It stands for "alcohol clinical training" when including alcohol, although that is not the most common usage of the acronym. More commonly it would stand for "american college testing".
Answer:
I wish I could help but I sure I saw a question like this on khan academy. you can try there
For starters, some victims would be too scared to prosecute people due to threats or fear of retribution. Many people could go unpunished this way. Another big thing would be that criminals could hurt anyone who could prosecute them, so there wouldn't be a victim that could do it.