Too much of a good thing?

This time I've broken off from my regular mommy posts to ponder a bit on this. When well meaning relatives decide whats 'best' for you- and keep doing the same thing over and over again- what do you call it? Foolhardiness? Shortsightedness on their part or just plain stubbornness? And when, you decide not to say anything- not because you can't, but because you are too well mannered to, are you solely to blame for the anguish you heap upon yourself?