We have a ban report for the more major offenses. And for minor things you should talk it out with the other person. If the mods get involved over such trivial disputes, the problem will not be solved, the animosity will still exist. If you are still unable to resolve your issues, go to a moderator on chat, and we'll try to mediate. We're incredibly logical people (even someone as insane as me) and we can probably make everybody see reason.
Also, as has been mentioned by both DT and myself numerous times, a page for this kind of thing where we can let users comment and complain ends up with the situation escalating. The ban report is kept because of its continuing usefulness in bringing more major issues to the attention of the moderators, but even then I constantly keep an eye on it so as to hide the many comments added that just end up making matters worse.