Where are some good ghost hunting places in Grand Rapids, MI without cops?

This was a question posted on Yahoo Answers a couple of days ago. It has received no answers except facetious ones (presumably because the fool who posted specified "without cops" which means he intends to vandalize wherever he goes?

In a larger context, I  have to admit I dislike these "Ask a Question" sites like  Yahoo Answers, etc. I mean, jee suz. Go to the library and look it up yourself. Do a google search on "Ghost hunting in Grand Rapids" and you'll find tons of websites.

In fact, let me do it right now:

There's something called the Grand Rapids Ghost Hunter's society - their website looks moribund.
http://grghs.50megs.com/Index.html

Mostly it's links to news articles. For example:

http://www.wzzm13.com/news/article/178656/2/GRNOWcom-Ghost-Hunting-in-Grand-Rapids
GRNOW.com: Ghost Hunting in Grand Rapids

Then there's this excellent site:
http://www.ghosttourdirectory.com/ghost-tours/united-states/michigan-mi/