WOW newb help

[FishPolice]

Sorry if this has been posted before -or if it's a really dumb question:

Basically every so often I keep getting spammed by constant invites from people to join their group. I keep hitting decline but sometimes the only way to get around it is to accept. So then once I'm in their group I'm told to go to some website to download the latest WOW hack or whatever at which point they disband the group obviously.

Is there a way to configure WOW so no one can invite me into a group?

 

[FishPolice]

Thought about that but the spammers seem to be different each time & zone. Presumably it would take longer to add them to my ignore list than to just join their group and get told to go to wow-toolbox.com or whatever.