IS MUSHroOMs growing from the soil a bad sign to my grow/harvest of plants???

currently, i have a 400 hps light in a 4x4x8 Agro tent. i use a fan to usher in cooler air, my temp is usually around 82* and 45% humidity.. i remove the hot air via a ducting along a 10 ft wall, leading to a carbon filter fitted with 350 cfm..
today i checked the soil and seen at the base of the pot, where water seeps out, i noticed some small mushrooms growing..i quickly removed the mushrooms..so i need to know if the mushrooms can lead to a problem with my "infected" plants..im rather concerned their might be too much moisture in the soil, but any answers are welcomed..please help me out with this...i really perfer not to use insecticides or pesticides..if there is an alternative solution please do help me..

Its a sign of having a fungus in your soil.

Here's a pretty good article on it.
http://www.gardeningknowhow.com/indoor/getting-rid-of-mushrooms-growing-in-houseplant-soil.htm