In our culture we see the tarantula as a big vicious spider, poisonous, ruthless and out to sink its fangs into us! This is hardly the case, in fact, it's completely the opposite. A good majority of tarantulas are docile, and only if provoked they may rear up in an aggressive posture to give you a warning "Leave me alone!". Now by no means am I saying go pet one in the wild, but remember they are afraid of us just as much as we are to them.
There are 2 types of tarantulas, the Arboreal, which live in trees and high places and the other is terrestrial meaning they burrow into the ground. Tarantulas are very fragile, sure they are big but, if a tarantula falls from 6 inches it could be severly injured and a fall from a foot it will most likely be fatal.
Many people ask if tarantulas are poisonous...yes but, their venom is pretty much harmless to us. I do not think there has been a case of someone suffering a fatal bite. If bitten swelling will appear, it will be painful for several hours and reactions vary from person to person, some have harsher reactions than others. In any event if bitten while out adventuring I would recommend seeing a doctor.
If you are ever faced with a tarantula in your home, before smashing it you may want to try and trap it then release it back into the wild, they are not out to get us they just get lost sometimes! I hope this has given you a little bit of insight on the tarantula.