Does it not annoy you when other people say stuff like "I came here to say that" or "This."?

To you, the writer, it may mean something and you probably feel like you're contributing because you actively participated, but to the reader what you said amounts to an upvote. We would have gotten the same out of your comment if you just copy and pasted what you were replying to.

Basically, people don't care who you are and if you agreed with the person; I know that might be a hard concept to grasp, but it's the truth. You only matter as a number next to the person's name.

Note: This is all null and void if you actually contribute an additional thought to the thread.