I am pondering this...?

Has anyone made the observation that ghost, UFO and bigfoot type sightings were prevalent in the 70s and into the 80s (along with many blurry photos and grainy film) but in this day and age where many, if not most, people carry cell phones with still photo and video capabilities; the sightings are fewer in number? Could it be that the ghosts have become shy, the aliens have gotten better at cloaking themsleves and "bigfoot" has gone off to retire?