shortened down from the original post, what do some GMs do when using RFID tags, astral signatures and IDs in their games. i would just like to know how other gms may use this in regards to any repercussions from PC actions
Stealth RFID tags are great to put on something that might be stolen. Most especially high value employees. One trick is to implant them surgically, which can cause really big complications to an extraction.
I put astral signatures into the same category as DNA evidence and various possible cameras that caught the PCs image and recorded it into a server somewhere. They're things I might pull out to complicate matters or if a crime was major or very loudly done. However, I'm careful not to use them every time or even a majority of the time. It's easier bookkeeping and it also speeds up gameplay if you don't make your PCs hideously paranoid. (Shoot for somewhat paranoid rather than hideously paranoid, depending on group tastes of course)
Somewhat similar with ID checks. I make ID checks for major purchases, like a foci. I might make one at a major checkpoint on a Shadowrun. Most of them time I will not. Once again to keep things running smoothly. It's a complication I might use as a tool to spice things up. I just will not use it every opportunity to screw them, just like anything else.
Too little use of these various tricks can lead to a dull game where players feel they are in God Mode on a video game. Too much use of these tricks and players will think of you as something like a Killer GM. (Someone out to screw them at every opportunity and with the power to do so)
Also on the subject of IDs. I'm nice and give all players a level 3 ID for free at Chargen. And I don't make ID checks for most regular purchases if they make the purchase with at least a level 2 ID. So, if they don't get that original ID burned, I don't make checks much of the time, unless they are buying something like weapons or foci, anything that might be used to kill citizens.