Throwing this up for posterity. User BigSunGlasses uploaded two images to the Series 2 list page (the images appear to be identical, and rather familiar, at that).
I sent them the following PM:
Hi there,
I'm Zyn, a moderator on the SCP wiki.
It's been noticed that you uploaded an image to the files associated with the SCP Series list (the page is here). If you want to have an image hosted on the site, please upload the image to the actual article page that the image will be used on, or use a sandbox page if your article is still in the draft stage (you'll need to reupload when you create the article on the mainsite). Generally images are not supposed to be hosted on the Series 1 or Series 2 lists, and staff members routinely remove such images as part of site maintenance.
If the images you've uploaded are gone by the time you read this message, you'll find them here. If you have any further questions, feel free to PM me or another staff member.
Regards,
Zyn
They've also got a rather short coldpost on the site that might be related to the pictures, but it's pretty vague. I'll give them a few hours to reply/remove the images, and if they don't do either then I'll put the pics on the misplaced images page.