Is there a way to stop receiveing spam messages on inbox?

Is there a way to stop receiveing spam messages on inbox?

Hey all,

I keep getting spam messages from different users. Every time I post a review on a service my nickname is open for other users to spam me.

Is there any way to stop receiving these messages or have them sent straight to a spam mailbox?

If not, Is there any way to disable my inbox/private messages so I stop receiving these messages?

I always report them as spam, but they always keep on coming, from different users.

See image: http://imgur.com/z9Nvndr