I'm going to post other people's content to reddit without their consent
Did your friends ask you to post their content to reddit?
I'm going to post something on my own, and they will be none the wiser.
That is wrong to steal other people's content. You should get their permission before you post their words to reddit.
I don't care about the source. All I care about is getting the credit for whatever I post.
Passing off other people's words as your own is plagiarisms. Sooner or later, your scheme will be discovered; it's not that hard on a public forum. You will lose all credibility -- us that worth it?