Installing neochat results in a "systemsettings" package being installed as
well and "KDE System Settings" desktop entry added on a non-KDE system. This
is not correct.

Hi,

I agree that this is not correct. However, neochat does not depend on or
recommend the systemsettings package. Purely installing neochat will not
install the systemsettings package.
If it was installed in your case, then it was another package that
pulled it in.

Debugging this is hard if you do not provide any information about your
system. What system are you running ? Which command did you run ? What
was the output from apt/aptitude ?

I'm closing this bug because it is not a neochat bug. Without providing
more information there is no chance of resolving this.