Listings apps are not diaries
If an app’s business is selling tickets, your “going” status is a marketing object. A gig diary should treat past shows as personal history first.
Radar is built as a diary: you log nights, tag people you trust, and control how public a profile is. Do not assume every concert app works that way.
Friends are opt-in overlap
Shared-show features only work if both people are on Radar and connected. Random attendees at the same arena should not get a ping that you were there.
Photos belong on the gig you attach them to. Keep them off a public feed unless you mean to publish.
What to log if you are cautious
Artist, venue, and date are enough for stats. Skip photos and skip tagging anyone. You still get a timeline and Wrapped from nights only you can see in detail.
If you share a profile with friends, review what is on past gig pages before you screenshot stats into a story.