Well, is it true? I don't see worm dropping puerh actually brewing into tea,
just sludge...

It's a myth among pu'er drinkers that when the tea gets really old that
some insects can get inside of the tea and then die. Some people say
worms...some people say moths. In my experience, I've never seen it in
reality; only in some old men's rambling fables (usually in Cantonese).
heh.