Is it immature to call someone out on social media if they've done you wrong?

Katie • I`m 21, basically just here to track my period. Nevertheless, I enjoy involving myself in the community when I get the time ^_^ Married as of August 8th, 2017.
I want to see what others think about this, based on a conversation I had with a friend. I personally think it's immature, and if you have a problem with someone, talk to them, it's not the internet's business. Her opinion is that sometimes people just need to rant and get stuff off of their chest.
And when I say call someone out, I mean everyone knows who you're talking about, no anonymity. 
Thanks for the responses :)

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