I would be more wary of people announcing peaceful intentions.
Give everyone a bloody nose.
hehe, I AM by nature a pacifist, just got inspired by an episode of star trek where Lieutenant Worf snaps at another member of the crew, exclaiming angrily: "Don't approach me unannounced, especially when I am eating"
I do think true sen sen no sen involves somehow feeling that an attack is about to come, the extreme extremity of sen sen no sen, I suppose, would be to assume everybody is out to get you and then "do unto others......". It does resemble the attitude I used to have in my youth - hit first, hit hard, keep hitting
Luckily my attitudes have moved on.....
All the best