I think Richard's preference has been to encourage self moderation amongst posters. My own personal view is that banning should be a last resort.
I have emailed Sven privately a few times to encourage him to modify some of posting habits by avoiding pejorative language. It's fine after all to disagree with the creation of a(nother) glut of life peerage creations. With a life peerage or Bishopric being the only ways into the Lords now, I worry that the House of Lords is now entirely vulnerable to the patronage of the Prime Minister of the day, and I worry that creating peers seemingly without limit could damage the Constitution. But to call it "disgusting" isn't necessary and lowers the tone of discussion as mentioned by jks.
It would have been helpful if Sven had cited a source for the future 28 peers - I cannot find anything with a cursory look. If the creations are simply to add to the Labour benches as "lobby fodder" then its a worry, but if they are for people with expertise in specialist fields who can contribute to debate in the Lords then I am much more comfortable. More detail might have helped us to have a real discussion, rather than what sadly was a pejorative post where no-one wants to engage the actual topic directly, and instead we're into a discussion of what to do about the poster.
Having watched Sven's posting for a while he tends only to post on the more political aspects of the peerage, namely the House of Lords itself, the removal of hereditary peers from the House and life peerages. I think this is legitimately within the scope of the group, even if he takes a viewpoint different to most other posters on some issues. What is regrettable is that he cannot find a way to disagree a bit more agreeably.