edit: not true https://news.ycombinator.com/item?id=48077990

"I don’t like people adding tracking stuff to URLs" and "You abuse your users by adding that to the link" and "no unauthorised query strings" and "At present I don’t use any query strings" but for some reason ?igsh, which i'm pretty sure is an instagram tracking parameter, is allowed. weird

?igsh doesn't get through for me, and I don't see any links on the page including it.