LFR isn't bad at all if you basically know the fights and aren't doing things that make your crew die. I pretty consistently take 5-8 toons at once (heals and DPS), less if I'm bringing a tank. With distinct names and varied classes, no one ever says anything. Even with the complex mechanics in SoO, they really aren't bad to box. In most LFRs I do, my healers are the top or second highest and my DPS average about 6th highest out of 17 DPS, so I'm definitely a boon to the group.

It is blatantly obvious to me that a quarter to third of the raid is following one toon, but I've been amazed that no one ever says anything about it because things tend to go very smoothly. That's my experience anyway.