Blend in does not seem to work too well.
I was playing on an Earth map (mine) as France (regent level).
All 16 civs were in their "correct" places.
I *tried* to expand as fast as I could, and managed to get Holland and Spain, but Romans settled North Africa, English covered their island quickly and Germany, Russia, and Greece quickly filled eastern Europe.
For many years, we all got along great, I developed my nation, building wonders and mines/roads etc etc. But when land began to run out in Europe, Germany began to get "restless".
It actually was Russia that decided I owed them every tech and coin I had, and perhaps it was my mistake that I didn't say "Yes mayam". Instead I told Catherine to take her empty threats and stick them "something somewhere". Well they weren't empty threats, and Germany declared war after Russia invaded. After I lost my first city, the Romans and English joined the fun and they had a "cut the French cake" party. My loyal subjects reverted the city in Holland back to me, but when the Russians retook the city, they rush built some troops using French citizens as building materials.
Laying too low seems to make you a "partition target"!
<---- captured French workers!