Number Players

I was playing Roblox High School for hours and hours. When I closed the game, I found a ton of friend requests that were only numbered, all of them had no gear, no faces, nothing. They were all the same value of numbers but not the same name. I tried clicking on one of them; he had no friends, no followers, not even following one person, and so for all of them. I ignored all the friend requests. I told my brother about them, and he said "I had the same thing too" I was shocked, he also said, " I tried to accept them to see what is going on but they were all banned." I started to freak out, I tried searching one of them...I finally found one, and he wasn't banned this time. I clicked with him. He had nothing in his inventory. He looked new, but the account was created on 5/10/2014. He was all white. I found his game. It was the same name as his username, 12345678924681025122. I clicked on the game. No game passes, no players, no visits, I was the only one to visit this game. I played the game...and I was literally in the middle of nowhere, just flat grass. When I clicked out of the game, I have never heard of those players again...