Former US public HS Math teacher here. The summer before I started teaching I obtained a cell phone signal jammer (from the EU, where they're legally available) and quietly kept it in my desk. I didn't have to confiscate a single phone over the three years before I walked away from the job. Lots of internal chuckles from me brought on by complaints about the signal quality in my room. Granted, this only worked becaus…
The device might be legally obtainable but using it in a way that affects the public (which includes the students) is a serious crime anywhere in EU. I'd guess it's the same in the US.
> Throwaway accounts are ok for sensitive information, but please don't create accounts routinely. HN is a community—users should have an identity that others can relate to.
https://news.ycombinator.com/newsguidelines.html
What's prompted me to remind you is that I've observed this 'throwaway' account commenting quite combatively throughout this thread, which makes me think you've created the account to 'give you the freedom' do just that. Which is against the culture here.