Sheikh Muhammad Nur Abdullah, President of the ISNA (Islamic Society of North America) and member of the Fiqh Council of North America, states: This is an avenue that will most likely lead to worse consequences, and therefore it must be blocked and prevented. Almighty Allah says in the Qur’an:” Those who love (to see) scandal published broadcast among the Believers, will have a grievous Penalty in this life and in the Hereafter: Allah knows, and ye know not.” (An-Nur: 19)
Therefore, I would say it is unacceptable to watch these pornographic cartoons, and doing so will be counted as a sin.