Why do some people create fake accounts?

Why do some people create fake accounts?

1  1-      swindling by sharing an amazon wishlist or just directly asking people for money or gift cards.

2  2-      destroying other people reputation by counterfeiting.

3  3-      since they can attract many of under aged followers, they can set up a fake date by deceiving their victims and they may be sexually harassed  or stolen by fake guys .

who knows how many innocent kids have fallen victim to this .

so why dont you help stoping them when you can do it just by sharing their usernames.