> Stupid example of why it may matter: say you installed LAMP on your computer several years ago, you're not using PHP frequently, and you haven't kept it up to date (so it probably contains a few nasty security vulnerabilities), but it still opens up on boot and listens on localhost.
> Now you open some website, it accesses 127.0.0.1, check for the LAMP vulnerability and exploit it if found.
Congratulation, you have been pwn3d.
> Stupid example of why it may matter: say you installed LAMP on your computer several years ago, you're not using PHP frequently, and you haven't kept it up to date (so it probably contains a few nasty security vulnerabilities), but it still opens up on boot and listens on localhost.
> Now you open some website, it accesses 127.0.0.1, check for the LAMP vulnerability and exploit it if found. Congratulation, you have been pwn3d.
Interesting but very rare scenario?