There’s a fine line between being cool and looking like a stuck-up, self-important idiot. Many people, alas, cannot see the difference — and we’ve all had the misfortune, at one time or another in our lives, of meeting them.

A Reddit user named finleyg113 recently decided to start a thread that was part public service announcement, part vehicle for the venting of many people’s frustrations.

He asked a very simple and very blunt question: “What do people think makes them look cool, but actually makes them look like a douchebag?” In response, he received a great many brutally honest replies.

Here are some of them. We think you’ll be able to relate to and sympathize with much of what was said.

The Fine Line Between Coolness and Douchebaggery

  1. Have you ever seen someone do something ostentatiously nice for someone and then scurry off to capture everything on video so that they can post the result to the internet? Clearly, people like this are not truly generous souls. They are self-seeking narcissists who are more concerned with getting praise for being nice than they are with being nice. This is true whether they chose to hand money to homeless people or buy their friends nice cars.

  2. While we’re on the subject of nice cars, we’ve all seen people who insist on showing off theirs just a bit too much. Surely, you’ve seen that guy before with the Lamborghini or the Bentley who makes a big show of racing it down residential streets and obnoxiously revving its engine.

These people are desperate to make sure that everyone knows what nice cars they have, and they are generally losers.

  1. Following celebrity gossip is a guilty pleasure. Within reason, following the exploits of a famous person or giving them admiration is a totally innocent thing. But some people go overboard with it. Whenever someone expresses disapproval of something that some celebrity said or did, there always has to be that one person who jumps in to play the white knight. When you insult strangers because they insulted another famous stranger, you just look like a zombie.

  2. Those who take public transportation are people just like you are. If you want to listen to music in public, that’s fine, but do it with consideration for the others around you.

You don’t have to get on a bus or subway and blast your music for everyone to hear. Not everyone shares your tastes.

  1. Clever pranks can be funny, but pulling pranks on people has now grown into a way for status-obsessed narcissists to win internet clout for themselves. And many such pranks are inherently stupid and only invite trouble. When you pull a bad prank on someone and react with justifiable anger, screaming “It’s just a prank, bro!” over and over is not a valid excuse.