I'm sending this as a separate email because I want to be sure it gets read.
\begin{grumpyface}
Last week we had an annoying zoombombing incident. We strongly suspect this was at least in part because the link to the talk ended up getting posted on social media.
We kindly ask all of you to refrain from posting the link in this way. There are just too many trolls and annoying bots out there, and while the bombings are easy enough to deal with, they are quite disruptive, and it would be better if we did not have to deal with it.
That's all.
\end{grumpyface}