There is another level to this that I think a lot of people overlook.
Short answer: Search engines are an immense tool and this site does get ranked pretty highly in a lot of categories. If your name is here, people WILL find it. What do you want people to see when that happens?
I get emails sent to me fairly often from people who have long standing "bad guy" threads here about them asking, demanding, and sometimes begging, me to remove the threads about them because now, later on in life, they are finding that prospective employers or business partners are using the internet to research candidates for positions, and these threads are popping up for them to review.
So yeah, if someone wants to be a bad guy and screw people over because it is actually easy to do, go right ahead, I certainly cannot stop you preemptively. But don't come crying to me later on when you find out that your poor choices today will affect you dramatically tomorrow. I didn't make that bed that you are sleeping in now, YOU did. And no, the threads here about you, no matter how old, and no matter what you WANT, will NOT be deleted.
So choose wisely the path you want to take with your life today. Even if you only want to be a clown and make an ass out of yourself here now, go right ahead. It might not matter to you now, but how's that crystal ball working out for you concerning your future? Think you may come to regret that when someone important to your future sees it?