[andsmi2]

If they are reporting a bug in the app one way to prevent this is a help/about that has an e-mail address (or some other contact type--but e-mail is best) and also in your description note that they can e-mail you directly for any changes/suggestions/help -- this generally prevents 1's for bugs-- and you can deal with the "disgruntled" 1'r and calm them down and give them a fix.

[chrisBob]

That is good advice and works for me. I only leave negative reviews when there is no contact info, or they don't respond when I submit a bug.

[riquardo2]

Good points.