As we play form different countries, humans has different way of perceiving ethic.
So.. it's abount common sence, altruism vs selfishness based on ethic. You can be right, he can also be right.
In my case, I play in the game the same way I am in real life, if I need to be selfish to be rich, I prefer not to be. I've been making a LOT of friends by not being selfish, and If I need anything, there is many many people that would give me anything I need. I just don't ask for it, because I don't need anything.
For example:
Is it okay to buy ALL vegetables from a local store?
You can, there is no rule about it.
Shoud you do it?
- My life depends on it or I will help others, I will act thinking about others and not myself, because I will giveaway or sell cheaper so others can buy
or
- I will prevent others to have it so I will sell it on a higher price, as I will be the only one having vegetables, I put high price, because I am selfish and I don't care at all about anyone else