I have a strange fondness of them even though they do look disproportionate and even creepy in the game. I have Miis of all my immediate family which we created back when there was only the original Wii, so that's probably why I still like them regardless. I've only been to other towns using Mii heads one or two times but if anything I had more respect for those people because I knew they were likely an unpopular choice for the same reasons we've all stated here.
Though I haven't personally tried it, I imagine wearing sleeveless dresses or shirts with long pants would take the attention away from the Miis long head? In other words, anything that makes the AC body look long as well.