When numbers of people you've never met know who you are. Infamy is a species of fame.
You know that you're famous when you are recognized by total strangers while shopping, walking down the street, etc.
Your not free any more like everyone else.
You have to watch where you go.
Never go alone. When your on stage your an idol,
when your off stage your a target.
When you have your own fandom and implausible ship pairings