Can you follow someone on Twitter without them knowing?

Related questions

1. What is the difference between following and followers on twitter?
2. How do you follow a twitter account?
3. How many tweets does it take to trend?
4. How many hashtags should I use on twitter?
5. What is the net worth of twitter?
6. What is the most used hashtag on Twitter in 24 hours?
7. Can you follow a hashtag on twitter?
8. Can twitter users see who visits?
9. How do you get out of twitter jail?
10. How do you know if someone is following you on twitter?

Tags

1. #tweets
2. #reader
3. #their
4. #private
5. #google
6. #subscribe
7. #visit
8. #basically
9. #follower
10. #visiting
11. #twitter
12. #follow