I really think some are not understanding how Twitter, Instagram, Snapchat, Pinterest, etc,., work. You can follow strangers. You can find people who have posted pics or videos you like and comment or follow. You can meet people online (gaming) and follow them because of common interests.
I follow TONS of people on Twitter and I have many followers myself but I do not know them. Same with the other social media sites. I know that in this case, there is a link between Trevor M and Lewis, but just know that because you see a "Follower" and even comments to and from each other, it does not necessarily mean they know each other.