Thanks for the correction Adrian - my oversimplification went too far, and into "plain wrong" territory.
(The detail that I felt was too much for this explanation was: "and the way to simply get rid of them would be to set your archive command to '/bin/true', say".. but didn't want to make it seem like I was suggesting Paul do that)
> This is why everybody will tell you "don't just delete these files, > archive them properly!" Again, for operational purposes, you could just > delete them. But you really want to make a /copy /of them before you > do... you know, /just in case /something bad happens to your DB that > makes you want to roll it back in time.
No you can't just delete them for operational purposes without knowledge of whether they are still needed or not.