Well, dmania is getting delegation from @misterdelegation which is a steemit inc account. If anyone gets sued for plagiarism, it won't be dmania's anon founder. It will be @ned and the steemit team.
The reason plagiarism and spam florishes on steemit is that no one cares about sueing others for stealing their work. It is a big hassle and has legal expenses.
Pardon my interruption here. If we are going to sue every mother fucking plagiarist of photography and meme, then I am sure as hell there will be a legal congestion given the abundance source of this stuff circulating on Facebook, Twitter, and Google + being re-posted without legal permissions whatsoever.
The diff between those sites and steem is that money is involved in steem. Monetization is happening here. Compare steem with monetized sites like youtube not demonetized sites like google plus or twitter.
I believe, but am not certain, that everything other than text is stored off chain, and so if issues arise they can be hidden.
And I believe, but I am not certain, that half of the text is also plagiarized. Only a few thousand users, like you, care enough to be original.
Myself included as far as written content is concerned.