I rated this 1 for the following reason:

1) Super duper low effort script, it's 6 lines of code that any Skripter could write

2) Theres like 100+ of this EXACT script already posted... we don't need this.

3) It breaks being able to check for plugins in console. Therefore if someone asked me (the server owner) "which plugins do you have?", I cant get them now.

4) You can still see all plugins via `/version <tab>` ...

5) Rather than wasting time writing commands to block another command, just remove/negate the permission for it.
Thats right, the plugin/version commands have permissions you can remove/negate for players/groups.

In summary, if you want to post a resource on SpigotMC, put some effort in, and actually write something people need, not something we have 1000 of already.