IIRC, it got started on /reddit/r/The_Donald. I might have some of the details wrong, but the gist of it (or at least the part I've read) is this.
I think it was Shia LeBoeuf who said he was going to put up a flag with "He shall not divide us" (referring to President Trump" with a camera on it 24x7, with a website showing the pic...saying that the idea was, the Trump fans couldn't find it.
Challenge accepted.
Within 24 hours, the flag had been located and replaced with a KEK flag.
The people supporting Trump looked at the flag, and noticed contrails appearing in the sky behind it.
Noting the time the contrails appeared, and the direction they were headed, gave them information to compare to weather reports (the skies had to be clear) and to flight information (time and direction). By dint of hard effort, they found and removed the flag in 24 hours.
Read about it here.
This is what makes me think Q is real. Dropping obscure breadcrumbs allows him to avoid CIA and other DeepsState web sniffers, and yet the power of weaponized autism allows those who follow him to perform *extraodinary* research -- e.g. his call to investigate Mezhvinsky (Chelsea's Husband)...