Time Travelers, Back Off
I try to be pretty privacy-aware went writing publicly. This includes not disclosing where exactly I'll be at a specific time and place. I don't want someone malicious to know where I'll be!
It feels more okay to talk about where I was, after it happened. For example, saying I was at a certain concert or similar event. There's something similar I've seen people do for their public Instagram stories -- they share pics of their activities/event only afterwards and not while they're still there.
However, there's the time traveler issue.
I'm sure most time travelers are (/ will be) nice people, but there could be some malicious ones. I worry slightly about letting them know where exactly I was on a certain date. It crosses my mind when I disclose these things.
(This is 99.999% satire but there is genuinely a 0.001% part of me that feels wary about posting about where I was.)