The other day I was swimming with my daughter in the gated community pool, and some guy asked to get in and that he had " forgot his access card " to unlock the gate. 
That would make me nervous! you never know what kind of person it could be, a predator perhaps.
Exactly what I was thinking since he didnt have his card, but also was wearing jeans and a bookbag! Nothing that one would wear or bring to a pool. 
True!