Certified GKH Gardening Expert
Unfortunately, your photos did not come through. I am unable to see the organisms in question. Whether they are harmful or beneficial would depend on what it is.
If they are mushrooms, then pulling them up will, only, spread them. It will take eradicating the entire mycelial web beneath the soil. Unfortunately, since I am unable to see them, I cannot offer much information on the subject.
These collections of articles can offer some, general, information, though: