Strip Feedburner campaign parameters (and other campaign parameters) from submitted URLs.
This doesn't have a functional impact on the website, since the link still works, but as a web analyst I have OCD about keeping data clean. If people are getting to the page from HN, then their visit shouldn't get credited to feedburner. There's also a benefit to HN in doing this: In google analytics, campaign data overwrites referrer data, which means Hacker News does not receive credit for the traffic it directs to those sites, if there's a campaign code stealing credit.
While the same applies to any sort of analytics campaign tracking query parameters, Feedburner is the only culprit I've seen on hacker news, and they generally have the Google Analytics tracking parameters, which all start with UTM.