The problem: masonry.desandro.com is getting DoS by so many Tumblr themes and poorly coded sites that hot link directly to the script.
Possible solution: redirect requests to cdnjs.com assets
Hotlinked assets
masonry.desandro.com/jquery.masonry.min.js
masonry.desandro.com/jquery.masonry.js
masonry.desandro.com/js/jquery-1.7.1.min.js