Hacker News stories for 4 PM on Tuesday Jul 17, 2012

0.936 Copyright Holders Punish Themselves With Crazy DMCA Takedowns comments

0.746 Rotate database credentials on Heroku Postgres comments

0.444 R.I.P. Donald J. Sobol, Encyclopedia Brown Author, 1924-2012 comments

0.017 TapEngage (YC S11) acquired by Dropbox comments