Wow, sorry that happened. Every time I think I've seen and heard it all, I'm just dumbfounded by people's capacity for cruelty.
Uh, I think it depends on what were the intentions of that person.
Maybe that picture was supposed to be an allusion, like, "hey, look how good can you look w/o scars. You just have to do something about it".
A lot of people have absolutely no knowledge of how to treat acne scarring. I mean, why would anyone with great skin research scar treatments? They think that a simple procedure or one laser treatment will make your problem go away, unfortunately they are terribly mistaken.
It's normal (I speak from personal experience) and I wouldn't care much about it. Unless the intention was to make you feel like crap, in that case I agree with cutting such person off.
Sorry I disagree. That is like photoshopping a photo of someone overweight and saying you would look great skinny. Go on a diet. How do you know that person doesn't have a medical condition and can't lose weight? Or, why not photoshop a picture of a bald friend and say I hear you can get hair surgically added today. Saw it on TV. I would never point out someome's physical flaws and tell them to do something about it. I do not need superficial friends like that. If I did not confide in you about my insecurities and flaws, what would make you think it is okay to point them out and worse, why in the world would you be researching a way to fix my skin condition. Believe me, scar sufferers are clearly aware of their scars and disfigurement. Don't need a so-called friend pointing it out.
In some cultures, this might be okay. Where I am from, you'd be completely out of line. Mind your own business and focus on your own problems.