I'm not big on making waves in the art community, so I will not name any names, however... I would like to say that if you are an artist, discouraging another artist (especially if you're just a couple of years older than them) rather than telling them "hey, I see you didn't/did _____. Just wanted to let you know that the proper way to do that is ________ and if you need help let me know, or link them to a page that can help. Rudeness, however, does not belong here. At all. Ever.
This is a community for artists; we learn here, we sometimes get jobs from our work posted here (Lara Jade anyone?), and we grow. If you can't be decent with new people or younger artists just venturing into the world of refining their talent, then for heavens sake, DON'T SAY ANYTHING. If you see a rule infraction that's serious, report it. Otherwise? Help your fellow artists. Do not be the jerk who ridicules and harasses those just getting started. Their mistakes are honest mistakes and they will be so glad to hear a friendly "hey, don't forget to do this." You'll find most people will gratefully listen. Remember back to the day you fell in love with art. Remember how easily one wrong word or sentence of non-constructive criticism (aka an insult or belittling someone or harassing them (which is bullying, whether face to face or online) could discourage them to quit, to think they can't do something.
If you don't care about that, you don't belong in a community.
Okay, end of soapbox.