User prgamer recently posted the following feedback on a draft (that needed a lot of work):
http://www.scp-wiki.net/forum/t-1063165/an-invisible-snake#post-2177610
You're good to go.
Kalinin staffposted and wrote a line-by-line, bless him. I took the staffpost further and told prgamer to stop giving feedback until he had a successful piece on the site, given that he's been called out by staff before.
Another instance is here: http://www.scp-wiki.net/forum/t-783406/the-jigsaw-man#post-1980760
Good, but you need to work with spelling errors and formatting in the end. Good, but still needs work with spelling and formatting. You can find formatting help in the how to write a SPC guide in this website.
Given that they haven't figured out how to use the forum "reply" button and they've demonstrated not understanding other aspects of the site, I'm assuming they're just not familiar with the general community and etiquette. (Also, I feel that it merits mentioning that they made a thread asking if anyone on the site had autism, since they were diagnosed with high-functioning autism.)
Keep an eye on them. Official warning if they keep giving bad feedback.