What always gets me is how these beings of superior technology manage to evade all of our detection systems, yet are spotted by regular eyesight. They have ama

What always gets me is how these beings of superior technology manage to evade all of our detection systems, yet are spotted by regular eyesight. They have amazing ships, able to do these seemingly physics-defying feats, yet they point beams of light at things we could easily detect without resorting to such wavelengths. They have antigrav, yet they need to land and rest on tripods, leaving indentations in the ground (when they're not too busy making crop circles, that is). If you're able to use fold travel to get around relativistic limitations, I should think that avoiding or camouflaging emissions in certain wavelengths would be child's play by comparison. We already have a primitive form of it ourselves. Thus, working under the reasonable assumption that they are able to evade detection, sightings would indicate that they are not trying to remain hidden, but instead have travelled countless light years in order to spook rural families rather than opening up interstellar relations. I wonder if their home planet knows how their tax dollars are being spent?