I did not know this and keep meaning to look it up, so thank you!

I think it’s at least partly a geographically defined variety thing. Like my impression is that it’s all or mostly cum in Indian English but basically all slash in the American English I come across (including my own)

Honk receptacle!

I would encourage you to reach out! Sometimes organizers really are unaware of these things and appreciate having them pointed out. Sometimes there’s internal disagreement in committees, and sending the signal that this matters is really important support for those who are fighting on the inside.

Yes, I read the first post in this thread three times before I figured out what you didn’t mean