Hi Joss! I hope this decission helps you to reach your fat loss, building muscles, performance or any goals you have right now. I made that decission a while ago when I realised no matter what the scale said I was not going to be happy because what makes me happy is what I see in the mirror. I also love when my performance in the gym improves and when I realise that I had developed a healthy relationship with my food mainly in social occasions when I think about the people and not the food that surrounds me.
I think using the scale as a tool is good in general but when you are a featherweight who is been eating healthy for a while, knows what foods sit well with you, what exercises are good for yourself and you let the scale dictates your mental state that day is time to stop and focus in just eating right and exercise as you always do and get back to weighing if you feel like it whenever you are in a healthy mindset again. At the end of the day, the important thing is to be consistent with your eating-exercise plan.
I think I have reached a point where I feel healthy, think healthy, I'm not looking forward to have a splurge or a day eating non stop, I think about enjoying activities outdoors, going to concerts and travelling and my state of mind is not reflected by a number on the scale but about being in control of my behaviour. It's taken my a while to reach that state of mind. For me, one of my major helps is a FB group I have recommended countless times before
https://www.facebook.com/groups/fiercefitfearless/ It's about women who are featherweights, IF and weight lift mainly, though not everybody does IF, it's a feather or lifts. The mentality in the group is not to focus on the scale, but focus on using fuel as a means to nourish your body, to create the body composition you want, to concentrate in your performance when lifting as it is the way to reshape your body. Just a simple mental switch in the way you see things and for me I feel even happier with myself.
In any case good luck with your decission and hey the scale will always be there, you can go back to weight again when you feel mentally ready again.