Comment by vkou

Here's the thing. If you're going to forbid a bunch of words and names for bullshit security 'reasons', you're going to have to be clear and up front about it.

Just like how we are clear and up front about water bottles, knitting needles, bottle openers, and nunchucks being forbidden in carry-on baggage. We clearly sign all that shit, we don't just keep that list secret.

Put up some wall-sized placards listing the words and device and product names (or the kinds of names, we don't need to be pedantic) that you are not supposed to use in airport, so that there is no confusion on the matter. Just because this is obvious and unwritten in your cultural context doesn't mean that international travelers who may not speak the language well are going to be aware of all the unwritten bullshit rules.