I don’t think it’s a joke or even paranoid, just a bee noticing the effect of a quirk of human brains.
Noticing an illogical thing because their brain took a shortcut and dusted the fallout under a rug isn’t an easy experience. The first instinct is not to assume our mind has broken, it’s to try to find the answer to make the event explainable. Often that involves thinking only inside the scope of the event because no other information is immediately apparent.
So, you can work around these things but you’re going to run into problems if you do:
-If you reset the router, you need to restore the original password else they’ll know
-if they notice you using these devices when you wouldn’t have access, they’ll remove them further from your reach. Possibly permanently.
-If detected, a larger conflict is likely to be escalated. This includes a loss of the benefit of the doubt in the future.
I’d suggest that this is not the battle to fight. They’re likely fighting your apparent obsession with tech. Let them have this battle and continue your fun later.
Try the Stormlight Archive, wheel of time, or mistborn books. Maybe the redwall books if you’re younger. Fun and focus can still be had without a computer!