Assume they do have access, as do the Russians and the Chinese and whoever else. Don’t share identifying info. Limit even non-identifying info that is unique to minimize opportunities for triangulation.

I think back to training I had many years ago about posting enough info that my identity could be obtained. Post that I was a soldier and it does next to nothing to identify me. Post that I lost a leg and it starts narrowing down but still not enough to identify me. Post that I am from Idaho and someone with any websearch skills can make a pretty good guess who I am, or at least narrow down to where more direct techniques can be used. And because it’s quite difficult to remember all the details I’ve posted, I tend to nuke my account and start from scratch periodically, especially any account that touches on the political.

Those were examples btw, I am not a legless vet nor a potato farmer. Or am I?