An IR is not the best place for that. Use the Contact Us link under the General Info header at the footer of all pages and "Make a Suggestion" to Admin that way. I'm not sure if single cards in sets can be blocked for adult/sensitive content, Admin may need to block the whole set (up to his discretion).
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).