Background: I'm a PhD stident in Russia with an advisor coming from the US.
There are several community causes that are related or slightly related to academia; two that come to mind are Academics against the immigration executive order and Battle for the the net neutrality. Whenever I learn of a similar community cause, I'm inclined to send a personal email to my advisor, because
I feel it is important to know about these causes,
My advisor can take action and support them.
However, there are concerns that discourage me:
Academics are busy
My advisor might already be aware of the cause, in which case, I'm wasting his time
Emails that seek to support a cause may seem unprofessional, if not downright spam.
Is there a community consensus on how appropriate such messages are?