Is hiding your own disability immoral?

Is hiding your own disability immoral?
It's one of the things I often wonder about.
As some of you know, I often need the aid of crutches or a walking cane to be ambulatory. However, I also make sure to hide those problems when in public, for example by sitting down often or leaning against certain items.
No photography of me using such appliances exists, and when it happened that someone snapped a "wrong picture" I demanded their phone and deleted it. I think I could sue someone for taking a picture of me with crutches.
I don't want for those things to be seen, although many people inevitably know - and something I find myself thinking, is that perhaps I should be more open about those things as to encourage others and share. But then I inevitably think I would be seen as a weak leader if such a thing was public knowledge, and so I refrain from doing so.
Is hiding your own disability immoral?
Post Opinion