I grabbed this from another thread, and thought it might generate some neat ideas as its own discussion rather than getting lost over there.
I tell them to look at having this Flaw as a mental challenge, find unusual ways around it, as well as finding new ways to use it against other people
So, how about a list of technology that we as a GM can use against the players, or tech that the players can use against NPCs?
Here are some random thoughts on this:
* Cell Phones -- can't call out, so they can't call in either. This would mean that if someone places a tracker "bug" on you it might not transmit.
* In Illinois we have this thing called an "I-Pass" which does automatic payment on the toll roads as you drive through. I-Pass might not function.
* Credit Cards -- what about the magnetic strip on the back; does it become demagnetized with spell use? Or magnetic "swipe" keycards. Could a wizard cast some magic in a region, only to find that magnetic locked doors are now unlocked?
* If magic is somehow electromagnetic, could a person use a regular magnetic compass to help track a wizard?
* I know that Harry drives an old VW because of modern-day computer chips in cars, so is it possible that Harry could intentionally use magic to sabotage sombody's car? (Has he done this in the books? I don't remember.) Of course, ordinary computers would hate him as well.
Others I haven't thought of?