Why are web browser cookies considered dangerous?

This statement is misleading. While cookies can be accessed by the server that created them, they are not publicly available to anyone on the internet. They are typically stored in the user's browser and are designed to be sent back only to the originating server, maintaining a level of privacy.

While it is true that cookies occupy space on a user's device, they are generally small in size and unlikely to significantly exhaust disk space. Most users have ample storage capacity, making this a minor concern compared to privacy issues.

This choice suggests that cookies contain essential data, which is not entirely accurate. Cookies primarily store session information and user preferences, but they do not hold critical system data. Deleting cookies may result in the loss of personalized settings, but it does not impact critical data.

Cookies themselves are not capable of executing code or containing viruses. They are merely text files that store information. While cookies can be used in conjunction with malicious scripts, the cookies themselves do not pose a direct execution threat.