
Ravingdork |

One of my players is playing a draelik ghost operative with an SEP Field. He is turning every encounter into a complete joke!
What do I do?
The technology involved in making something properly invisible is so mind-bogglingly complex that 999,999,999 times out of a billion it's simpler just to take the thing away and do without it....... The "Somebody Else's Problem field" is much simpler, more effective, and "can be run for over a hundred years on a single torch battery."
This is because it relies on people's natural predisposition not to see anything they don't want to, weren't expecting, or can't explain.
;D

warmachine |

If such equipment did exist in-game, and it was being run as the default heroic drama rather than absurd comedy, the OP is just not thinking technological space fantasy enough. Corporations will design, patent, and sell counter-measures.
A Make it Everyone's Problem Ray is an example, with flying drones constantly zapping secure areas, leaving a wake of concerned people shouting "What's going on?"
Another is the Child-like Bothering Familiar, which is a tiny robot that sits on your shoulder, is too stupid to understand what's going on, points at people it doesn't recognise, and asks in a shrill voice "Who's that?" It insists on an answer and never accepts "Who cares?" Reports of actors in live theatre jumping off stage to attack them are merely rumours.
Alternatively, consider the hand-held Zen Detector device. Those utilising SEP fields need to act in a calm manner, as if there's nothing to be concerned about, in an area where inhabitants have their own problems to deal with. Where a creature within range is clearly not agitated or concerned, the device connects with the organisation mainframe and will project a hologram of the local manager demanding some project status. If no manager applies, it defaults to a zealot trying to recruit for a local religion. If the reply isn't an expletive or a punch, the hologram points at the target and issues random insults about their hygiene. Adams Technologies does not sell this to children and it's not age restricted anyway.