Many of the other sites have social media accounts. I think we also should do the same. These are powerful way to communicate in the moderns world.
You are welcome to create social media accounts and use them however you like; however they must be clearly marked as not run or sanctioned by SE corporate. Something like "This page is administered by members of the Buddhism Stack Exchange community and not affiliated with Stack Exchange, Inc.". Stack Exchange logos (including the beta "Bu" logo) also can't be used by the page as a profile or header image.
Aside from all of that, I would encourage you to think about what you will be using these pages for. I mentioned above that we no longer automatically set up Twitter accounts for newly created sites. This decision was triggered by the fact that Twitter was shutting down the new accounts almost immediately after creation, making the creation process for these accounts take several weeks when the amount of return we got from those accounts barely warranted several minutes. Hardly any ever managed to scrape together more than a few hundred followers - a mere handful in the Twitter world. These accounts are robots shouting questions out into the void, and nobody is listening.
I would argue (and have done so in our internal discussions about social media) that an underfollowed and totally automated social feed is leaps and bounds worse for an entity's public image than having no presence at all. More briefly: not doing it is better than doing it poorly.
This community is free to do as it likes with these social accounts (provided that they follow the guidelines above). But first I recommend asking yourself what value you see these pages adding to your community.