Okay, I can understand the intent. However it still looks broken. AnonyMouse’s post includes several nested quotes, and if you don’t want to make those into the interactive quote boxes then there should be some indication that those are quotes without displaying the raw code.
Also, what I still think is an actual bug: In that post the quote boxes don’t expand to show the original post they quote from with the quote highlighted. This is unlike most other quote boxes on the BBS which is why I think it’s a bug.