NBN seems to be all about knowing who the Runner is and REALLY FAST AGENDA.
Presumably, with the tagging comes some bagging. The best way to get explosive footage is to set of the charges yourself, right?
Sure, but then we see other cards like Psychographics which uses the number of tags on a Runner as an upper limit on the number of instant Advancement counters you can transfer to an Advancable card. Five tags on a runner playing NBN and the Corp can install an Agenda, play Psychographics and advance to completion that Agenda with no possible response from the Runner.
As I see it, tags aren't just for bagging any more, they can be used to accelerate an Agenda much faster then the Runner can get to it. If you know where they are and what they can be doing their work 'somewhere else'.
That said. Exploding Housing Complexes always makes for good news.