Rape/non-rape differentiation

Posted under General

I've been noticing the rape tag missing in many images whose context I would consider to be rape. As the tag description says, it's rape if one participant is unwilling to have sex. The border can be vague since Japanese porn often portrays girls as the soft and submissive participant to sex, but one can tell it's different if the girl doesn't reciprocate the love and willingness for sex to the man. Especially in group_sex situations where the girl doesn't seem to be enjoying herself, and when it's pretty obvious the girl is grabbed by the arm so that she can't escape.

I've been wondering because the tag often gets removed if I try to add the rape tag. Should there be some demarcation regarding what to consider rape and what to accept as submissive sex?