I remember a guy who used to publicly tease me and spread rumours about me at work when he noticed I was using concealer (I was 21 yrs old at NW3 with crown thinning). This guy was a typical cocky NW1.
Fast forward a year he started losing hair EVERYWHERE and FAST too! Went to NW3 in a matter of months. I have never seen somebody loose their spark in such a short amount of time. As bad as it sounds, I took pleasure in watching it too.
hah! you should have offered him concealer..publicly.