In the last five years it hasn't come up at all as everyone is doing it and people seem to dig through their analytics less than ever before, but if it helps you track links to your own content, as being shown in the article, it's certainly worth a go.
Another amusing point is that HN didn't used to strip these parameters, so sometimes I could see when people had reposted things from our newsletters on to HN (and kept the utm params in) which was always a buzz :-)