Starting the second layer of chocolate before the top one is finished.

[VisitorsEntrance]

Crime of the year.

Or

Fine.

Agree what once there are 2-3 left in the top layer, you can start the second layer and put the spares into the gaps.

Very bad form.

It's known as "bottom troughing" here and is absolutely unacceptable

These were communal chocolates that someone had brought into work.
Someone started in the second layer before the top one was done.
There was much conversation.

Fine.

How else do I get first dibs at the orange creams?!

Do it and put the top layer back and play innocent

Fine, but when you dig into the second layer, fill up the gaps with the chocolates that remain on the first layer.

Communal ones?... ooh no!

Unless you’ve got an agreement going with someone with opposite tastes...

I was going to say that it's absolutely unacceptable, then I saw that it was at work, which I would consider every man/woman for themselves. I have literally no justification for this thought process.

Wrong, and evidence of the moral decline of the nation