Perhaps it's a phrase they use. "Correction needed" could imply abuse (sexual abuse, in the context of this being a phrase of pedophiles) of a child, maybe.
Urban Dictionary: Need Correction 💢💢 A word used by Lolicons when a loli is "in need of correction" (usually meaning "corrective rape"). Commonly used alongside Uohhhhhhhhh😭😭😭 and Cunny. www.urbandictionary.com