I spent my teenage years mowing my parents 3 acre lawn with a tractor and gang mower and always trying to figure out the optimum method. My favorite was the random swaths, but maybe not the most efficient. I think that got me interested in computer programming, algorithms, and graphic design. Remember, Philo Farnsworth invented television by looking at corn fields.

All of our Air BnB guests were film makers, musicians, computer programmers, or parents visiting their children in Los Angeles (Silverlake). Everyone that uses Air BnB has to put up a profile and a photograph. They also need a valid credit card that is checked before they even contact the renters. Our guests could easily be found on the internet based on their profile. I think Air BnB is getting a bad rap here. They are great people. The perp was caught so fast probably because of the info Air BnB had ahead of time.

My wife and I used Air Bnb to rent an extra room and bath in the Los Angeles area. We had about 50 guests in a two year period. The experence was wonderful and we met many people from all over the world, many that we are still friends with. We were living in the house, but often we were out, sometimes out of town for a few days, with my guitars lying around, while the guests had the keys. There was never any problems. We have since sold the house and moved on.

Maybe the poll options can only be humans, but if half humans are allowed a missing option would be Spock from the original Star Trek TV series. He is the master geek of all geeks.