Zend certified PHP/Magento developer

Why does AWS create a default RDS DBSecurityGroup?

It’s unclear to me. Why does AWS automatically create a default RDS DBSecurityGroup? Looks like there is one for each region.

On top of that it seems impossible to delete (or at least that’s what the doc says). Even if I straight up don’t use RDS.

Honestly, it’s only bugging me because I’m using the tag editor to list all the resources in my AWS account (trying to keep things clean) and more than a dozen show up, polluting the results.