1. A computer-implemented method for deflecting abnormal computer interactions, the method comprising: receiving, at a computer server system and from a client computer device that is remote from the computer server system, a request for web content; identifying, by computer analysis of mark-up code content that is responsive to the request, executable code that is separate from, but programmatically related to, the mark-up code content; generating groups of elements in the mark-up code content and the related executable code by determining that the elements within particular groups are programmatically related to each other; modifying elements within particular ones of the groups consistently so as to prevent third-party code written to interoperate with the elements from interoperating with the modified elements, while maintain an ability of the modified elements within each group to interoperate with each other; and recoding the mark-up code content and the executable code to include the modified elements.