In one of my games in Hub_04 I've got a lot of messages regarding network defenses and my scoresheet shows 25 network hubs destroyed (and awarded 25*200 points for that). Later terminals showed that network defenses fell to 96% rather than 80%. Below is the relevant part of game log.
27292_ HV Slug penetrates Wall.
27293_ Penetrated by Slug.
27294_ HV Slug penetrates Wall.
27294_ Y-64 Sentinel suffers critical hit.
27294_ Destroyed KE Penetrator.
27294_ ALERT: Network intrusion management efficiency reduced by 20%.
Dispatching hub defense squads. All non-combat units evacuate.
27294_ ALERT: Network intrusion management efficiency at 70%.
27294_ ALERT: Network intrusion management efficiency at 65%.
27294_ ALERT: Network intrusion management efficiency at 63%.
27294_ ALERT: Network intrusion management efficiency at 62%.
27294_ ALERT: Network intrusion management efficiency at 61%.
27294_ ALERT: Network intrusion management efficiency at 60%.
27294_ ALERT: Network intrusion management efficiency at 59%.
27294_ ALERT: Network intrusion management efficiency at 58%.
27294_ ALERT: Network intrusion management efficiency at -1036831849%.
27294_ ALERT: Network intrusion management efficiency at -1056964508%.
27294_ ALERT: Network intrusion management efficiency at -1061158812%.
27294_ ALERT: Network intrusion management efficiency at -1045220457%.
27294_ ALERT: Network intrusion management efficiency at -1036831849%.
27294_ ALERT: Network intrusion management efficiency at -1028443241%.
27294_ ALERT: Network intrusion management efficiency at -1022738987%.
27294_ ALERT: Network intrusion management efficiency at -1045220457%.
27294_ ALERT: Network intrusion management efficiency at 100%. <x3>
27294_ ALERT: Network intrusion management efficiency at 98%.
27294_ ALERT: Network intrusion management efficiency at 97%.
27294_ ALERT: Network intrusion management efficiency at 96%. <x2>
27294_ Slug penetrates Wall. <x2>
27296_ Y-64 Sentinel heat damages Adv. Heat Sink.
27296_ Y-64 Sentinel destroyed.
27297_ Acquired 53 matter.
I did not see a hub being destroyed, but I can think of 2 ways this could happen:
1) some penetrating weapon of myself/my allies/0b10's defenders hit a network hub through a wall or
2) I left an ally near a network hub, so that the next patrol passing by him will hopefully destabilize a hub (and everything went according to the plan?)
There were no AOE weapons used to my knowledge. (my uneducated guess is that it counted each destroyed tile of a hub as a separate hub destruction event)