I've been a Mac /Apple owner/user for too long - to say. If you know what my avatar is and know what a 512k Mac is - you'll have an idea.
As long as I've been Mac - I'm surprised only seeing this problem just now. I also got the Ray Ban spam. How irritating! We shouldn't have to go to all these different variations to combat what in essence is more than just spam - it's a security issue!
When I started looking up solutions I found what I thought to be a paid solution - "iCal Reply Checker." However, I found it won't work for any cloud /Dave based calendars. I use and have everything synced with iCloud, so it's not an option. And since Apple has been pushing icloud SO MUCH - they really need to address this!
I did a right click to see if I could delete the invite without notifying, but that option still shows notify, as I'm sure it does the same when, as someone suggested clicking on the invite and hitting the delete key. I saw someone also post; logging into iCloud and changing some option ... to have any responses be done by email, then create a filter for the calendar spam. I did the very helpful option; create another calendar, dump the invite into it and then delete without notifying.
I was confused about that last option:
At first, I thought everyone referring to this option was talking about deleting all of iCalendar's critical files. I thought, "oh no, what a hassle - I don't want that."
However, anyone who might be thinking similar - people are actually referring to the separate calendars (i.e., work, holidays, family) You can see those separate calendars in iCal's browser that's able to be shown or hid (on the left in iCal's browser) To create a 'junk' calendar - go to "File" in the menu, or right click on the browser, and select 'new calendar'
I'm sure some of this has been repeated. I'm just jumping on the band wagon, too. I don't have. Maybe someone else can post the link to make suggestions to Apple? I agree! This has been a too LONG of an ongoing issue and Apple really needs to address it.
just my 2¢