And how many incidents go undetected?
Worse, LOVEINT is a bit disturbing, but not the kind of abuse that's serious on a governmental level.
Suppose the next election is Hillary vs. Christie. Would you be happy with people listening in on Christie's phone calls and those of his circle and supporters? Or Hillary's?
Imagine how that could be abused to swing elections. Counter strategies. Embarrass or blackmail donors.
All because the technology is in place with weak protections that a determined agent (or cabal) could easily bypass.
Just the "metadata", knowing who these people talk to, can be seriously abused.