Non-genetic related iron overload is rarely heard of outside of dietary supplement overuse, predominantly children eating iron fortified supplements.
For an ordinary person to eat too much iron, you would have to have an exceptionally bizarre diet, especially if you're overdosing on iron via elemental iron.
The upper tolerable limit for a daily intake of iron is 45mg. To get this via sirloin steak, you would have to eat three and a half pounds a day! Or 3700 calories of steak per day.
Given that heme-iron is the most readily absorbed by the body, and that guidelines suggest vegetarians consume 1.8 times the RDI, which would suggest an 80mg upper tolerable limit for non-heme iron.
So lets take Broccoli, everyone knows that's iron rich. 2.1mg per medium stalk (1/3lb), which would amount to 7 lbs of Broccoli a day.
Please, don't state bullshit like it's a fact.