edit to add: DV has been a common abbreviation for the term long before social media

Not common enough that I had heard the abbreviation before. (And I'm older than social media and the internet itself)

Maybe it's common among people involved in the topic, but I'd bet the wider population doesn't know what it means without some added context.

“algospeak.” also prevalent on tumblr a la “CW: DV, SA,”

I also don't know what any of those 3 are intended to mean (without further context).

Excessive brevity destroys clarity.