I think Kishi's right. The practicality and ease-of-use of multi-quoting is really nice, and I was pleased to see it implemented. In fact, I'd always wondered, up to that point, why EoFF hadn't had it in the first place. Is it possible to simply limit it to a small number, such as 3 quotes? If not, then I think using the warn system is good enough, and repeat offenders should get a warning themselves, much like with double posting or oversized signatures.