Why not? I've been known to do this as well. I'd rather put a quick link to a relevant source of information explaining why I did something the way I did than s

Why not? I've been known to do this as well. I'd rather put a quick link to a relevant source of information explaining why I did something the way I did than spend 2-3 lines trying to explain it. I probably most often use it when I've hacked around a known bug in someone elses framework - linking to the respective ticket, that way if someone comes along later and the ticket is resolved, they can remove/adjust whatever I've done. Links are everywhere else, why not in our comments?