Yes--and mushrooms gather up more pollution too, so it might be hard to find good ones. I have heard of stropharia being common in wood chips though; that shouldn't be bad. Nasturtium flowers are spicy too but I don't dislike them. That said I wouldn't go out of my way for them.

I also deal with overly strong flavours by turning whatever offensive vegetable into a pesto with many other wild herbs and vegetables, plus sunflower seeds (no pine nuts here!) It is still spicy, but in a good way.