Posts filed under ‘perpetrated by students or patrons’
Orgo night

Orgo Night.
Butler Library, Columbia University, 1960s-ongoing (or maybe 1980s-ongoing).
The Columbia University Marching Band plays at 11:59 p.m. the night before the Organic Chemistry final.
http://en.wikipedia.org/wiki/Columbia_University_Marching_Band, www.cumb.org
Awkward dancing
Coates Library, Trinity University, San Antonio, Texas, 2007. John Haskell teaches us about the sport of awkward dancing. http://www.youtube.com/watch?v=bmm4KV37-fA
Study breakdancing
Case Library, Colgate University, Hamilton, New York, 2007.
Three guys bust a move in the library.
http://www.youtube.com/watch?v=Z3lgzHGUgoM
Borrowing shenanigan
Rich (now Rich East) High School Library, Park Forest, Illinois, 1961.
The senior class attempted to check out all the books from the library. They got about halfway done before the library staff stopped allowing checkouts.
Interval library
Golda Meir Library, University of Wisconsin, Milwaukee, 2006?
http://www.youtube.com/watch?v=Ns314ZNaJb4
Library dominoes
Funk ACES Library, University of Illinois, 2006.
http://www.youtube.com/watch?v=cwihz7iZlx0
Addendum, April 1, 2014 (thanks, Steve Lawson!) The London Public Library in California put together a similar shenanigan in March of 2014:
A Star Wars Adventure
A Star Wars Adventure. Whittier College Library, March 16, 2006. A light sabre battle in the stacks. http://www.youtube.com/watch?v=b2WxwzGY42Q
The vinyl solution

Austin Public Library, 1996-1997. As an act of civil disobedience in protest of a library’s phasing-out of records, a patron borrowed 150 LPs and kept them out for many months. http://www.austinchronicle.com/issues/vol15/issue37/pols.library.html
Library musical
Library Musical from prangstgrüp.
Butler Library, Columbia University, 2004.
http://www.youtube.com/watch?v=ZaLf8FpO6p8
http://www.arrivistepress.com/February04/zbendinerfeaturewriter2nd0204.shtml
"All lit up for exams"
“All lit up for exams” (the f-word spelled out in library windows).
Dana Porter Library, University of Waterloo, Ontario, Canada, 2006.
http://www.boingboing.net/2006/04/12/uwaterloo-library-wi.html (Thanks, BoingBoing!)