This is a question for everybody who has a profile picture that was made by somebody else.
Did you get their permission to use it?
The reason why this is an important question is because art theft is against the law in some countries. People can easily detect if you are stealing art or not by looking up the picture.
It's not nice to accidentally or on purpose steal art. So please, if you did not create you profile picture, make sure you have permission to use it. Thank you.