No, it's not an indication of any such thing.
Bottom line is that some radiation exposure is inevitable and that some more probably isn't going to kill you, the reality is that ionizing radiation is ionizing radiation and that you shouldn't just assume that you can add more just because you haven't been killed by the radiation in bananas.
What's more, it makes a huge difference if you're prepared for the exposure versus not expecting it. It's normal when working in a nuclear plant to be taking potassium iodide on a regular basis, which isn't something that the general populace is likely to be doing. It's also not typical for the general populace to be wearing protective gear either.
And lastly, it makes a huge difference what kind of radiation you're dealing with and what the duration of exposure is.