Newby question

I'm new to the community and computer stupid! Dumb question here... How do I remove my profile picture from someone else's profile picture?
Whenever I reply to anything , like say, for example,welcoming a new member,my profile pic is placed on the bottom right corner of whomever I am welcoming. I don't see this happening with anyone else and their pis ? Can I stop this from happening? if I didn't ask this in the correct place my bad

 

This is a feature that allows you to see at a glance that you have commented in that thread. You're the only one that can see it. I don't know why you would want to turn it off.

 

@Bakershack is correct. Here's a pic of a thread I've commented in, and you can see my avatar is there too.

 

Yes sir, that is correct. I didn't know I was the only person that could see it. I'm computer illiterate, I don't do Facebook or Instagram or anything else online, just tundras.com and motorcycle sh_t
Thank you for the help