Heyas
Unfortunately my name is one of the names on your list and one of the dozens of names being used by whoever this spammer is. I was getting about 14,000 of these things per day but problem was that they were being sent by unsuspecting people such as myself.
I did file an AR some time back but since the spam continues it's obvious that the person responsible has not been stopped by LL.
I have not found a way to stop this problem, although it has slowed down to about 800-900 msgs a day (I get them in my email as I have notifications for IMs to email turned on).
About 10 minutes ago I did create a post about how to AR a problem when I don't have a name of anyone to report. When I first AR'ed this I reported the person that I suspected but I don't think it was him, since the problem continues and seems to be growing across grids.
I have scanned my entire sim, all objects, my avatar and have found no hidden objects. I do have a group of people that want to file a Group AR, but again, without a name, we can't use the standard AR form as found in Help.