People who make a big deal out of things that aren't a big deal are asking to have their motives scrutinized.
It's one thing if I say "Since you're leaving, I'm going to have your character show up as a NPC in a brothel in Dis at some point, for the lulz." and they say "I'd really rather think of my character retiring to open an avocado farm in Netheril, like she had always dreamed." Then I'd be like, "OK, fine."
If they come up to me and say "I'm leaving for 3 years, it's very important to me that you don't do anything involving my character at all because I'm very attached to them and I might come back someday and expect to play them again," I would be like "Ok, I'm going to need you to calm down; this is an Arby's".