I don't think it's "ripping off" tourists to ask them to pay a price they can easily afford rather than the usual local price, ridiculously low for a tourist.

I cringe when I hear Europeans proud that they haggled to death on an African market to lower the price from "cheap" to "dirt cheap". Dude, that's pocket change for you, can't you help the local economy a bit, and help the guy feed his family?