I must go back to some research of mine I did on this issue and post it sometime today. Yes they are extremely dangerous. Yes, my kids know also of 4 spiders in particular to avoid. (bar the ones in my T room) I just think that people are a wea bit paranoid about most species. BUT.....I would definitely avoid getting tagged by Sicariidae sp.( Loxosceles)

Follow this link : www.arc.agric.za/home.asp?pid=5480