Just simply stupid

Hi all, now I am wondering if I am insane or just simply stupid or is it something just not savvy, since over the past few days I have been watching a lot of videos on youtube and mostly about the zero point energy and aliens. Yet, I have noticed that one group of people are professing we have aliens living on our planet earth and sharing their technology, but another group of people are sending messages into the universe to try and contact aliens. So the question I need answering is, "why try to contact aliens when we are suppose to have them already here?" 

Now, I hope they don't try to tell me it is the wrong type of alien, just like it the wrong type of snow! Nope, that answer will not work also they are saying, the aliens they call Greys are made from vegetation are not really a being but more of a dish of salad. Oh, please, don't tell me that my plate of vegetables are cousins to the grey aliens and there could be a food war over the dinner table, this situation may cause a problem for vegans not eating flesh but only eating veg that are related to aliens supposedly living on this planet.  Well even after sharing my thoughts with you, I am still not sure what to believe or not to believe but I do know I will be studying my veg very carefully in the future for signs of alien life and I don't mean the caterpillar in the iceberg or cos.