They think you're crazy and guess what? You are. You're crazy about your ukulele and you're howling at the moon with happiness whenever you can sit and strum it. You're okay with walking and strumming, too, or dancing around strumming it, or jogging down the beach strumming it...yes, we get the picture and you do too. Keep playing and ignore what those know-nothings say. You're only listening to the ukulele.