If you mean that they are tricking anybody, that doesn't follow. We are already curious, and we are literally infants doing first baby steps and TBH we are stil

If you mean that they are tricking anybody, that doesn't follow. We are already curious, and we are literally infants doing first baby steps and TBH we are still pretty much clueless about things like how universe works via single set of principles, how many dimensions are there and so on. Can't get even to nearest star in reasonable time. You don't hide yourself by doing something so far unique and extremely visible in cca whole galaxy and even beyond. The real threat to such 'builders' would be much more advanced civ than us that can clearly see and understand what they see. 'What if' can be a nice mental game if you let your imagination loose in right direction, but its just a game and this one doesn't stand on any solid facts, so lets treat it as such.