Well, apart from changing your skin without dying (which I already mentioned yesterday), I just remembered another GOOD way of using this command: if you get lost in the middle of nowhere (for example if you crash your vehicle in the All Around SA race) and there are no vehicles near, and NOBODY is fighting you (so you aren't avoiding death, but just a long walk), then you just use /class and respawn.
also in this case i wonder....what's the fucking problem in using /kill instead of /class? lol since it isn't even made to respawn near the city
That if you kill yourself you lose all the money you are carrying, and players who care about stats have their ratio decreased.
For scripters: rather than removing this command, you can just add a line of code to its script so when you use the command, a message appears on the general chat saying something like
"Gryphus_One (ID: 9) has used the /class command", this way everyone can see whenever someone uses the command and spot the possible abuses more easily.
Another, more complex solution could be to disable the command in interiors and in vehicles, so you can use it only outside and onfoot, and when typing the command you get frozen for those 10 seconds until you are teleported.