In Kim's case his takeaway might be something like, you can't be a little bit pregnant. Either go all in or don't involve yourself at all.
But that's exactly what he's doing in his travels with the Paranet.
I don't know if the thread is still around, but there was one a while back where I suggested (or agreed with whoever suggested it) that Harry's lesson learned of "limiting information got people hurt or killed" was the wrong lesson because that hasn't ever happened. We went round and round, as we are wont to do, and I think my conclusion was that maybe he did it once, but it was usually someone else withholding information (or shutting him out) that lead to all/most of the trouble.
Storm Front: His client, Murphy
Fool Moon: Kim, Murphy
Grave Peril: His client (Thomas, but not harmful)
Summer Knight: Well, it's expected from faeries, but also Elaine
Death Masks: Withholding of information by "allies" not harmful, but happened
Blood Rites: Thomas
Dead Beat: Harry withholds information from the Council, probably caused harm
Proven Guilty: Molly, obviously
White Night: The "havenots" of the magical community, Thomas (sort of, but understandable), Helen Beckett
Small Favor: "Well, faeries" once again
Turn Coat: Morgan withheld info, but I'm not sure it caused harm
Changes: Susan, obviously
Ghost Story: Uriel
Cold Days: Sarissa, a little bit
Skin Game: Harry (a la Butters), but Nic's listening in