I believe Dominika is doing a very good job managing the prayer forum, and that all prayer requests which are in keeping with Orthodox doctrine and praxis should be accepted. As a rule, I think this should not extend into anything that might become partisan, for example, "Pray that we domt become united with the Roman Catholics," but I do not think there should be a blanket ban on non-personal prayer requests. But members should be encouraged to use discretion; for example, Russian members and American members are praying in church for the success of their respective countries military in Syria, where it increasingly seems that the two have opposimg points, and of course back in 2008 or 2014, well, suffice it to say, an inevitable clash could occur and thus there are some prayers best left as petitions in the Litanies and not posted in the prayer forum.
What really upsets me is when a member makes a callous or off topic remark ina thread in the prayer forum where another member has had or is having a personal tragedy; this happened to me when I requested prayers for my father who had just died, last fall. I wish that instead of responding in-line to posts like that, the moderators would move those posts to Purgatory, if possible.
Also, needless to say, if someone makes a prayer request that is completely inappropriate, such as a request that they be successful in murdering someone, that would really cross the line. I think members should only be allowed to post requests for prayers for the success of something that is not deemed inherently sinful according to the Orthodox church.