It seems to me that steem is a classic scamcoin, and steemit is being astroturfed like crazy. However, if a steemit link contains substantial, on-topic content, then the shadyness of steem/steemit doesn't warrant removing the link.
But if people are posting low-content steemit links in low-content posts, or posting steemit links constantly, then this should be reported. (Note that we might give a little extra leeway for steemit posts in the steem/steemit threads.)
You just butthurt, I'm not saying steemit is perfect and we all have our doubts, but atleast you won't censor anybody, seems funny that "scams are not moderated" but if something smells a bit fishy and affects your site directly it is a problem.