[waterhouse]

> according to this you can't delete anything.

This is a property of the internet and information in general. If data was served to clients at some point, then it's possible for the clients to have saved a copy (if nothing else then by taking a picture of the screen). Even if it happens that no one saved a copy, it's not generally possible to be sure of that. Any "deletion" feature would therefore be unreliable at best.

Being able to "edit" posts, to submit a new version of a post and have clients by convention normally show the newest version, sounds like a decent feature. (The older versions would, of course, be available too.)