I dunno... in the Clone Wars show, Ray Shields are nasty stuff. I'm thinking the episode "the box", where one unique alien could pass through a ray shield without harm.In The Clone Wars, as in The Phantom Menace, the shields would stop blaster bolts and lightsabers equally. I assume slugthrowers also since fast-moving objects get deflected. I presume a slow-moving Jedi could stealth up behind a droideka and slowly pass through the shield before activating his lightsaber and stabbing the droid, but that seems pretty freaking gutsy.
Others could pass through, sure, but it sure wasnt harmless.
Good point. Maybe it doesn't even hurt you right away but you find out later you have some terminal disease from it.
(Great way for the GM to spend 2 Despairs on your Stealth roll when you're doing this...)