Hey Growmie,
Botrytis is the most common, mushrooms growing around your plant could indicate that you have very healthy soil or it could mean the area is too cold and damp, and this can cause mold which I see a bit of in photo #2. The spores that are the cause of mushrooms growing in the soil are normally introduced by contaminated soilless mix. But occasionally, they can be introduced through other means such as airborne movement or spores brushing off clothing. The mushroom themselves won't cause a problem but the mold will, since it doesn't cause any harm to the plant, yes the plant can be smoked once it's ready for harvest.