haha yeah, that's pretty annoying but its like that because otherwise DT's would be too overpowered. In SC2 As far as I'm concerned there are no spider mines. Previously the Raven would use them, but now they were scrapped, so your DT's will rule the world on SC2.
spider mines detect ground movement. They don't have eyes. So even if the DT is invisible he move on the ground and mines detect that
Totally agree with the mines spotting DTs. I thought that the raven could place spider mines by using energy :S
i hope the spider mine comes back. i really do. maybe they should give them back to hellion or even reapers.
Seriously this is A SERIOUS TOPIC, not space junk. Why shouldnt SM be able to attack cloacked units? They detect ground vibration!
No, I would say t he DT being able to be invisible is his special strategy. Lorewise Terran er über humans, which technology is much higher then ours. Lorewise Protoss use psionic powers to go for example invisible.