Just a whimsical curiosity re how long you could get away with having super advanced future tech before you get caught out.
Let’s offer a few examples - Maybe you can think of some of your own. These would all be located in the US and subject to it’s laws.
In a monster truck rally in rural areas instead of “Truckasaurus” spouting flames coming on you have a 20 foot high sentient Warbot from 2500 AD standing in and doing some tricks like flipping over cars and laser slicing them up. Despite requests you do not give media interviews about your bot or make claims about it. It just performs. How many shows can you probably do before the authorities show up?
You bring your circa 3000 AD sentient android bot (and it’s very obvious by it’s looks it’s a robot not a human) into a busy NYC restaurant to have lunch and have a discussion with it while eating. You tip very well. Neither you nor the bot entertains nosy questions from passer by. How many times can you go back before someone shows up with the power to detain you?
You have a 4000 AD anti grav hauler you use on your farm to tote materials around and your activities and the hauler are visible from the nearly busy road. You have a locked gated driveway and do not respond to questions about "What is that? How long till the MIB show up?
Beyond the “How long can you get away with it?” scenario let’s say that (in the US) someone smart enough gets a look at it from near or far and it’s obvious it’s impossibly advanced and you are not deemed adept enough to have made it yourself based on current tech. Can it be taken from you?