If you broke the covenant, you're just plain out of it, there's not like levels of breaking it. >_>
If you attacked the cat I don't think that you can rejoin on that game. But yeah, you can make all of them fall to their death by just standing on the ledge, it's how pretty much everyone farms souls, and it goes crazy quickly.
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Falcon Punch
http://www.youtube.com/watch?v=FFtw7qW7Vcw