Ok Gary, hear me out.
This is the first, and most likely only time I've ever broken a nap, especially a P-NAP. I'm usually the non-attacking-attacker/resourcer who in the past has won the "most peaceful player" award....or was it "most peaceful leader?" One of the two, anyways...
So why am I breaking your/our P-NAP if I'm a non-fighter, you ask?
That is because, just as you say, 1418 is getting farmed by "3 or four different families." Sooner or later, my family will have to clear 3 or 4 other families from the area, just like 1433, in order to ensure my family's safety. They might be small fams like 1454 or 1449, be then again they might be 1436 and we'd have to fight to the death to (hopefully) clear them.
So, why, if sooner or later we will have to capture 75-80% of those planets we've taken, shouldn't we just skip the middle-man? I know, we have a NAP, but someone is going to farm your family weather it be the #1 fam, or #21 family, so if we just skip the other families taking them, then we don't have to monitor the area like a hawk, and strike at any sense of movement.
I don't like breaking NAPs, but I also don't want to end up in your fam's position by EOR. Survival of the fittest, sorry, but that's how it goes.
Please disregard the post above, the person who typed it is mentally insane and has three heads. Yes, three.