I run into many in my bookstore. I try to just let the shop for whatever they want in peace. And to only help if they ask. And sometimes when I bump into them, I am in the middle of working, and need to keep working. LoL, if I bump into anyone from this site, dont expect me to respond, because its your opportunity to shop in peace just like any other person. I may mentally make a note like I do with many of the of the other shoppers too.
Most just shop and try finding what they want, or just hang out reading. Thats fine and encouraged.
And if you want help I will help you, but make sure its that you really want help, and not just trying to talk to me or something. It would just be awkward for everyone.
One time I had someone pull me aside to look for a book I knew they didnt even want. They asked about a bible. I started asking specifics of what they wanted (we have hundreds and hundreds of bibles, different versions, and different indexes, size prints, covers/bindings, and other features), and they started to space out sort of, and not answer me. They seemed not even interested in finding what they had asked about, but rather just to maybe try talking to me or something. It just sorta made me upset because I am trying to help people find stuff out of a million or so different products. It just wastes both our time.
In addition, they picked a bad topic for me to waste time on lol. Especially with bibles. I am not christian, and cant stand (on a personal level LOL) being in that section, though my work calls for it. I only try in that section because I have to, but tend to get out of that section as fast as possible lol.