Hopefully this is the right section.

I have been mining on a pool for a couple of days now, it's a smaller pool and for a few days I was always in the top 10 with around 300 MH/s

In the past few days some giant miners have been coming in with TH/s of power, which in my n00b mind was a good thing.

It seems the admin of the pool does not feel the same and has been accusing these miners of exploiting the pool.  I am not 100% sure why so I thought I would ask.

To add more info, I think what they are doing is dropping in and out of the pool.  I can understand the admin want's miners to stick around, but is what the big miners are doing considered shady?