This is a very reasonable position on your part. Unfortunately there are many people who don't share the sentiment. I've personally had people bug me again and again via mail, IRC, and Twitter DMs over a relatively small project that I had abandoned/wasn't able/willing to maintain anymore. Sure, I can just go ahead and ignore those people or send them a standard response, but I still found it to be mildly exhausting. I can't really blame someone for wanting to avoid that.