Now, did they publish those 500 caches just so they could get the millionth cache?  

It's kind of stupid looking. I'm not one to complain about power trails usually, but this one is questionable. And DON'T let geolobo see that power trail

At least they took time to name them. Seeing 500 "Power Trail #359"-type titles would be pretty boring. That said, it doesn't look like a whole lot of thought went into the names as they are seemingly random.

There is another spam trail to the south as well. Not 500, but quite a few. Same user as that power trail and also came out this weekend. George Washington

Here's the GC map that shows a portion of the power trail as well as the presidential one to the south. Since GC limits maps to 500 caches at once, you can't see the entire power trail on one page
Power trail (eastern portion) & Presidential Power Trail (be patient -- it takes a while for the server to load the 400+ caches on the map)

Guy in Astrailia has placed 1,000 caches in a row.   Not published yet, but toooooo many.   Imaging the cost and maintainace.

Hmm...I thought you said "to be honest"

As for Australia...you would probably just do a maintenance run every 3 months, stopping only at the ones that were marked with a Needs Maintenance icon. Imagine what that guy's Inbox looiks like after a group of 20 cachers run a strip of the caches over a weekend