Really, please, just make it go.
If people don't wish to comment, than they can simply
Not write anything at all
Or it's meant to be sneery.
Or someone misunderstands it and offers it nicely with tea. And then gets flounced at with impunity. As no one really knows whether it's offensive or not.
In fact there are so many interpretations of what the biscuit means according to each individual, that technically you could probably have an entire thread using only the biscuit, with each poster making a unique comment.
There's another election due soon, it stopped being ironic and funny about 5 months after the thread that birthed it.
Seriously, just retire it.
I'm sick of trying to figure out why someone may have posted a biscuit. Post something clever, post something stupid. But don't post Gordens fucking biscuit 