RULE 1: Never search befriend people who is a artist... just for get free drawings. :I c'mon that's being a total ass trying to be friend of people just for extract them a free drawing... for then, unfriend, ignore or unfriend them because you did your achievement of extract they a drawing.
RULE 2: If this person is doing free requests. Just please don't fucking go every day to his/her page or note they and say: "is the request done?" "are you still doing my request?" "where is my request?". Ok, DO YOU HAVE IDEA HOW MUCH EFFORT AND WORK TAKES A ARTIST TO DO A PIC? doing a drawing is not like take a instant with a camera. Drawing takes time and a very hard work. So don't push, pressure a artist to done your pic :U they are not machines and not will have your pic done soon. But the only thing you'll get for doing this. Is get your request cancelled or get hated by this artist.
RULE 3: on streamings. Many artists likes to do request streams. So, don't fucking act like a dramatic idiot just for get your place first on a rq stream. You're just humiliating yourself.... just for a drawing.
The only thing you need is PATIENCE. for get your drawing.
RULE 4: don't spam people. If you just are not a artist and you're just spamming a artist with the only reason of befriend them, then you're wrong. You're just being ridiculous. So if you want to be their friend, just be a normal person and be nice. don't overreact.
RULE 5: Never ask for collaboration in your projects like. "Hey I search a good artist so I force you to illustrate my useless project and I not going to pay you for doing it"
like: 
Only a retarded idiot does this.
RULE 6: if a artist is your friend. Don't search them every time you want just for a drawing. C'mon if a artist is your friend. Learn to be their friends by what they are and not for what they do. If the artist wants to draw you a gift. Then enjoy it and never ask for more draws.
RULE 7: If you want to use the pic of a artist as your. For example: facebook profile pic, ask they if you can use the pic. even if is just a fanart of a character you like. If you do, don't forget to credit the artist. With a link or at least their username.
RULE 8: DON'T FUCKING STEAL PICS. This site is for publish art. not images you like. This is a site for publish art, not Pinterest :I
so, don't be a theft and make your own art.
RULE 9: Art is a business. You have to know a illustration has a aprox. worth of $60. all depends of quality and working time. If the artist does commissions, you can pay they for art.
RULE 10: NEVER USE PICS FOR GET MONEY WITH IT. Is a total steal use a pic of a artist for get money. for example, sell the pic putting the image on T-shirts, mugs, prints, etc. That's a crime and a copyright violation, and you can get a DMCA report for steal of intellectual propriety.
That's all. This is just the result of my opinion after saw comments, chats of non artists and posts and rants of artists.
