The worlds I went to... I made sure to stay hidden, doing what I had to do without revealing the big secret. My friends were told to do the same. we were there on missions, to save the worlds. As for the secrecy... there are plenty of bad folk who would use this knowledge for their own selfish ways.
[He pushes his teacup away.]
... But this world is very different. I've never heard of one actually sucking people in.