I understand that there are good LFSs and bad ones, good employees and bad ones -- this is true in almost any business.
Be that as it may, I take it as my responsibility NOT to support a bad LFS. I don't care if they are the only LFS in the area, I think that any store that offers bad advice, stocks and sells sick fish, and does not take it upon themselves to rectify the problems is bad for the hobby.
The last time I was in my LFS, there was a tank of butterfly fish swimming sideways, covered in ICH. The store clerk told a mother and young child, "They are just adjusting, they will all be fine."
I do not support this store.
In a time when reefers and our hobby are increasingly under attack for our part in the decimation of the world's reefs, supporting stores that act irresponsibly is, in my opinion, irresponsible.