[latchkey]

I've been wanting to write a simple script or app that just runs on startup to check for and fix this, but I've been so lazy. It is just too easy to edit the file and move on...

[jackson1442]

I'm even lazier, stole another commenter's script and just have it run on reboot.

Is it idempotent? No, every reboot it adds the line again. Doesn't appear to matter though.

[eevilspock]

I would never be so cavalier about a security related thing such as this.

See my other reply on this thread.