Just cause someone wear a hoodie that don’t mean they a crook.
Yes, but it does seem to the attire of choice for the 21st century hoodlums.
If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck.
Note the word "probably." It can result in false positives and false negatives. A false positive will make you avoid the person, with no ill effects. A false negative can get you killed. People use their own judgement to pick what they are more concerned about.