Are spiders safe for humans to eat without worrying about poison?

In general: Would caution against eating any old spider that you happen to come upon. In cambodia a species of tarantula called "a-ping" which is very large, is fried and eaten as a delicacy. However, some spiders are venomous & eating them could be detrimental to your health. Would not put anything in your mouth if you don't know what it is or how safe it is for consumption.