Believe it or not they are for flying squirrels.
http://www.fws.gov/asheville/htmls/podcast_transcripts/Cherohala_skyway.html
http://www.gainesville.com/article/20141005/COLUMNISTS/141009896?p=2&tc=pg
I was thinking today and maybe this is why Harley riders trailer their bike everywhere, they are tired of riding but still want to hang out with their friends.
I gave up owning a bike for 10 years and was happy with the decision, however I put more miles on my brothers and friends bikes than they did during that time. Had a M&E with several rides and one of the members summed it up real well, they liked the rides but really enjoyed the socializing. So whether you keep riding or not don't become a stranger.
Started helping on a beer truck when I was 13, did not pay really well but kept gas in my 1974 Yamaha DT125A. Joined the Navy when I was 17.
http://s760.photobucket.com/user/etcswjoe/media/Linked/407774_4147611451333_1794789152_n_zpsis1kr2yq.jpg.html
We had an empty grocery store in town for several years and someone was always breaking in and doing something stupid, meth labs, stealing copper, people living in it building campfires and many other things the cops showed up for.