alt Hacker News>Or you post a meme to a Californian left-wing group and it gets cached in DC. Not hard to imagine situations where getting an unexpected rough location could be a valuable signal.
Not really. Any public meme group is inevitably going to be monitored by intelligence agencies, and you should assume as such. Even if it isn't, I can imagine agitators from the other side joining the group with a Russian VPN to poison the well. If there's a private group of people that you supposedly trust, any competent mole is going to be using device/network level VPN to cover their tracks. Otherwise they're 1 click away (eg. if someone shared a link) from an opsec fail.
I would bet money almost no public meme groups are monitored by any intelligence agencies. And the few that are mostly only are just in the sense of being casually co-opted by state-sponsored trolls with almost no attention from actual intelligence agency staff (in the way this thread implies, with investigations and deanonymization and such).