I don’t like to poke fun at the folks at Granville Island, because they’re good people. But, c’mon, didn’t anybody consider that a cluster of red
onions cabbage also might look like, I don’t know, innards? I think the effect is more striking from a distance, but I was right next to the bus when I snapped this photo:
How does one avoid this kind of error? All you need is a little ad hoc focus group. Show the mock-ups to 20 people who are going to give you their honest opinion. Ideally these people don’t work for you.
Of course, it could be worse. You could have designed a web overlay ad for a game with this result.