I checked the report on the 9th June and felt the need to leave the comments there. The Community need soemwhere to rant and discuss the topic and what better place then a Jagex made thread.
If any posts need removed it could cause even more issues such as F-Mods being biased and soforth. At times we just need to take a step back and see what happens.
I will however seek some advice and see if any posts need removing. For Me they are ok not the best comments but I have seen worse.
I saw that name and sadly very little the F-Mods can do. The best thing is you and others have reported it in game and it's only a matter of time until Jagex deal with the reports sent in.
As you say the person with the bad name is or seems to be posting right now within the rules. If that changes then please come back here to make a report and it will be investigated.
Other then that our hands are tied really. Just remember if they post something you do not like or others do not like then best thing is ignore the post and carry on the topic. No law in the World thats says you must reply to them.