That the 'new' page is only so long and if people flood the new page with links hoping to gain traction with one of them then it will cause a lot of good stuff to be lost.
The OP seems to have interest in a particular topic in what he posts, and they are all from the same source. This is possibly his blog. I don't see a problem with that.
The thing to ask yourself is 'what if everybody did this'? If it doesn't work if everybody did this then it's not good. HN survives by virtue of people more-or-less being well behaved. It won't take a large number of people that submit 5 trash links to their content-free website before it will stop to work because the good stuff will be drowned right out.
