Nicely said
There are always going to be a people who are rude or disrepectful however staff will try their best to stop this. As you said players can /helpop to report the problem.
You can also /report (player) (message) as well. I would suggest this to be used if someone was directly targeting, however both methods of reporting are effective.
If you feel it is bad and no staff are online, you can also report it on the forums under player reports. If you do so please use the correct format.