As for the sprites, I've hidden the edit pencils, and moved the "Edit" link a few pixels to the left. The "edit" link could be further customized if you like (I've seen some wikis make it bold, or lowercase).
For the WikiActivity page, I was able to remove the sprites that appeared on the left side of each item. The paper sprite that appears on the right side I will need to do some research, as it's a link to the changes and not easily removed.
Thank you, maybe we can replace it with a Batarang sprite or something eventually.
Another thing I need help with is the white color behind the image area of infoboxes, also the space between the edge of the box and the image creating a white border. I have a strong dislike for this, particularly when an image with a transparent background is being used. I would prefer to have black behind the images.