About copycats, bans and rude people

Well I'm quite irritated at the moment.
1) I don't know why some people ask stupid and unkind questions such as "Do you call it art?" or "You think you're an artist?" or the worst, "You think you're great just because you join some exhibits?"
Well, you know what? I don't like joining exhibits at all. I mean, I could be more excited, as a lot of my friends and other artists are.
But I'm not.
Don't know why, I get excited drawing and printing my illustrations,that's all. I don't join exhibits because I think I am a great artist. I just think it's useful and it's part of my work. And I like the exchange,that's because I've never organized any exhibit all by myself. I like collectives. I love talking with other illustrators or painters, about our work, about the hours spent on each artwork, about the time we go to sleep and things like that.
I opened a Facebook Page (and then a blog) for italians people who love to draw, just for fun, it has something like 5000 users. I post links, useful pages for competitions,courses,articles about good artist,interviews, and what's the "thank you"? A girl told me I am a conceited person just because I joined an exhibit. Well.
2) Copycats. A boy asked me for some advices on his portfolio and style/works. I told him what I think. Result: he joins the same exhibit I join, with a work "inspired" by my Countess of Castiglione:



Well. Thank you, do I have to feel honoured? I don't know why, I currently feel just taken by him. Maybe I'll drop him a line. I am not rude, but I want he thinks I'm a loser and fool girl,you know. My eyes can see and still recognize a copy.

3)Rude people on groups.
They invited me to join.
I've joined.
I've submitted some works then after some "Denied" deviations they banned me. Without any words. I cannot write to them "You're not allowed to post here,sorry" "You cannot send this message,sorry".
Well, I'd just love to know why I've been banned and without any explications,because my behaviour has always been correct and peaceful and I always want the same from the others.
What? My works are not the quality you want? Well, then why you have to appear between my "Groups" when I submit one of my works? I don't want you,if you don't want me.
And please,when you ban someone,you should definitely drop them a line,ok? That's what serious people do, dear