@ Jeremy Cheng - The hidden post was not yours. The reason no explanation was left was that it was a case of someone mass spamming the same post across several threads. There was no need to leave a post on each thread, disrupting them further, and the spammer already had been given an explanation on one of their own threads.
I would suggest you add as many of them to your FC Ignore list and see if that helps.
Other then that not a lot really we can help with unless they are targeting your Clan within the Forums. If so then you can report here and a F-Mod or CM Staff member will check out the report.
Remember though goading others is a way to put you off playing. So they can win. It's been done for years. It's not nice but it's a way they can only win.
Hope they stop so you and your caln can enjoy the game better.
Also if they say things that You or your Clan mates feel are Rule Breaking then don't forget to report in game so Jagex can deal with them.
Comprehensive Account Security