There are millions of people worried about chemtrails. Should I share their concern too ?
There are hundreds of thousands  of people who sincerely believe that most world leaders a reptilian aliens wearing disguises. Should I share their concern as well ?
There are hundreds of thousands of people who insist that the earth is flat and scientists are all part of a giant conspiracy to convince us it is round (nobody seems to agree on WHY they would do that).

The number of people who think something has no bearing on it's likelihood of being true. 
Most of the 7 billion people on the planet believe in some sort of religion - yet everyone of those religions says all the others are flat-out wrong. At most one can be right then. So between 4 and 7 billion people believe, very sincerely, in a religion that is lying to them.

Science is not a popularity contest. Science is driven by empirical evidence.