Cheetah/SteemCleaners will comment a few times before flagging for duplicate content giving plenty of time to verify with them that the duplicate content is your own site. Cheetah has one job and it's very narrow, find duplicate content.

As for flagging because you disagree, while I feel you are free to use your stake as you choose, but if you say you like blue and I like black I don't feel that's a good reason to flag. If you said you liked blue and voted it for $100 and I disagreed the reward pool should be used in that fashion to that extent, I'd be comfortable flagging it.