If it's a flight reaction thing, it's extreme. If it's a deliberate lifestyle choice, go right ahead.
I know people who pretty much abandoned everything and everyone and moved to Australia, New Zealand, Thailand, South Africa,.. and built a new life there. Some more successful than others. Some are still roaming the world, having adventures, others are now settled down and have a family and everything just on the other side of the world.
I'll even say that I'm sometimes jealous and inclined to join them - especially NZ really appeals to me, I loved the atmosphere and the people there.
But it's hard, and I personally probably couldn't do it, or at least not that way - I'm too attached to too many physical comforts and things I've gathered through my life, the mmeories attached to those items even if they're technically worthless.