On a related note, the “Cities” episode of Planet Earth is an interesting one. Human cities are the fastest growing ecosystem on Earth, so why wouldn’t our fellow planetary inhabitants want to take our shit when we’ve been taking theirs?

I saw both links pop up as well. I opted to go with the first, standard, book— webster’s instead of cherry picking.

The problem is, both meanings are correct. However, the “troublesome” definition is primary.. and look at the example given:

1 to spread or swarm in or over in a troublesome manner

shark-infested waters

2 to live in or on as a parasite

You

Hmm

Thanks, you too!

Eh, we see lots of people infested places and they can also live there. The two things can both be true. (Granted the number of sharks needed for this title is a bit low).