There's nothing "copywright-able" about a community. I'm sure PG could give this guy a headache if he really wanted to (as could the authors who's content he's

There's nothing "copywright-able" about a community. I'm sure PG could give this guy a headache if he really wanted to (as could the authors who's content he's repurposing) but the general consensus of the HN community intrinsically encourages this type of initiative and rewards it when it's well done (just take a look at the revenues). Generally, there's all sorts of ramifications any time you do something worth doing - if you use that as an excuse not to start, you'll never do anything.