Stargate SG1 - Deadman Switch

In Deadman Switch, FLASH GORDON IS HERE!! If the Goa'uld are such a fractured group, why do all their ships and tech look exactly the same? Where are the hippy and the goth Goa'uld? Why does Sam poke Aris Boch's wound? Maybe all names of alien technology are just the result of random key smashes. Zat the tacs, man! Zat the tacs! Why doesn't the SGC have some kind of password with the Tok'ra so they can identify themselves when needed? How exactly does the self-destruct device thing work? And what IS the Deadman Switch in this episode?