Make brain damage randomly delete messages to simulate memory loss.

[GORE]

Deleting messages makes it harder to adminhelp those messages. Let's not.

Edit: That said, I'm totally down for Brain Damage having more middleman effects before "Oops you died". Just this one is probably unwise.

Why should that make it harder?

It depends on how one would code this; I mean it doesn't have to touch the text which was spoken by somebody.
The effect would be personal - limited to the afflicted individual.

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There's currently a bug where occasionally your items become invisible in your backpack, maybe adding it as a feature could work to simulate the same effect?

Yeah - but seeing as it is necessary to click-drag some items (lollipop bowls) to remove them from the backpack again; that is bad.
Those items just become stuck in your backpack. You can click on the tile - use them - but no longer click-drag items. Without click-dragging you cannot remove all items that exist from your backpack.