A better phrasing might be, to address @chrisc criticism:
We avoid comments, actions or propaganda that encourage discrimination related to gender, gender expression, race, ethnicity, religion, sex or sexual orientation, sexual characteristics, physical appearance, disability, or age.
Similarly, a better phrasing might be:
We understand sexual harassment as unwanted sexual attention, including but not limited to unwanted physical contact or insinuation of a sexual nature, as well as displaying images, drawings or visual representations of any kind that objectify members of any gender or reinforce oppression. The only exception is if this is part of a session, workshop and/or educational experience where showing these images is educational in nature.