More about this part of the movie (Re: When Rachel shot Leon)

Deckard invites Rachel to the club for a drink.  She says no and hangs 
up.  Then she reconsiders, grabs her coat, and heads out to the club.  
Fifteen minutes later, Bryant tells Deckard that she "vanished" and 
needs to be retired.

What's this?  She can't join Deckard for a drink without getting a death 
warrant?  Then why did Deckard invite her?

***

In the beginning of the film, when Deckard comments that the Replicant 
situation is "embarrassing," Bryant says it's "not embarrassing because 
nobody's ever going to find out they're down here."  But when a police 
officer shoots a running half ****d woman in the back on a crowded 
street, there are going to be massive investigations, by media and 
public watchdog groups as well as IA, into who this woman was and why 
the officer shot her.  How can they possibly cover this up?  A second 
fatal shooting a little bit later in the same neighborhood can't help 
matters.