I don't see how hacking one delegate can lead to all other delegate being hacked, since I am actually one of Bitshares 101 delegates, and I have no information regarding other delegates, they are all anonymous to me.
I can almost guarantee that likely delegates are found here:
http://bitshares.org/community/team/and than other delegates can be found by prominent users here:
https://bitsharestalk.org/ and Here
https://www.reddit.com/r/BitSharesHumans being social creatures are easily compromised with social engineering and than that can be leveraged by impersonating other prominent members.