There's been an influx of new users lately, which is great. We are also are having a comeback soon, which is also great. I just wanted to say a few things that I think every user should take into account before editing.
Look at the wiki design. If you have plans to change the theme/layout, talk to an admin. This is especially important on member pages and on any templates that deal with the main page. We'd love to hear your ideas, but please don't go and edit without talking to one of us first.
Check sources. Whenever editing on pages, it is crucial to fact-check information and to make sure you are using a reputable source. Sources we trust include: Soompi, Naver, Official SNS accounts. Sources we don't trust include: twitter accounts (that aren't official), Allkpop, Kprofiles. Also always make sure to cite sources, especially when editing on member or album pages.
Whenever you upload an image, make sure no one else has uploaded the same image. If we have duplicates of the same image it ends up becoming confusing and clogging up Special:Images. It also becomes an even bigger headache when different copies of the same image are used on different pages. So please, make sure no one else has uploaded the image before you. Also of note, please make sure the image you are uploading is high quality. If it isn't you can always do a google image search and find a higher quality version (On chrome: right click->Search Google For This Image->Find other sizes of this image: Large)
Anyways, I think that's everything. If you have any questions you are more than welcome to ask admin, any one of us would be happy to help with your editing questions.