You did stupid things when you were a teenager, because that's when you hope you make all the dumb mistakes you will in life. But with social media today, that dumb thing could end up online, and it could follow you forever. Here are some 20 teens who probably regretted whatever they did:

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.