Jack, I think he is talking about sending messages, not messages attached to friend requests.
However, to answer your question, you would be even more likely to be banned by adding multiple recipients, especially 1,000.
I'm not trying to be rude, but sometimes I wonder if these questions are serious. Before posting a question like this, you could always read the forum (which has a bunch of great info), use the Search function, or figure out the answer by simple trial and error. Just some simple tips that would actually help you out in the long run. It is definitely better to be able to figure out things on your own than to have someone answer all of your questions/handle all of your problems for you.