Wow, thanks for the really good reply Omanes, i appreciate it.

Does that killing/moving of population trick only work if you build peasants? Also, should i just not build these farms (or only at certain times)?

For the distance to the capital, should i just centrally locate it? there are no other drawbacks to this method?

should i just start destroying and buildings that arent built by me if there's a culture penalty? will i be allowed to rebuild it afterwards?