It's a response from anti-gamers to try and make it look like they have gaming credit and have been gaming for a long time. It's just like when Anita takes pictures of herself in front of a ton of games she's never played. It's an attempt to look like you have credit as a gamer.
Imagine being so insecure about being able to call yourself a gamer that you obsess over old games and constantly shove the fact that you've been playing games for 25 years down everyone's throat?