It's because of nosy losers with nothing better going on like you that make girls go hiding. If you think she's hot from the ad/reviews, go ahead and go see her. Don't make it personal. You're fantasizing about this whole interaction when the only time you should acknowledge a girl is between when she lets you in and when she lets you out. The way you describe the whole thing just makes you sound like a child.
There's a reason why girls don't want to see people they know. This isn't exactly the line of work you show off to people. You think it'd be shameful for you if you got outed? Think about how much worse off it'd be for the girl. There has been a ton of hotties who've quit or gone into hiding because they get outed. You're gonna say "oh but that's not me". Why'd that be, special snowflake?
