Even among obese WLS has a stigma attached to it. That something I recently learned.
As for me. Except for family members none of my friends know how much weight I gained in the last two yrs. They only seen me at 10 and 15 lbs overweight. I moved out of state for a few yrs and stayed in contact through phone calls and emails. For them to know how far I let myself go is too much for me to express. I'm not the vulnerable, soul bearing type anyway. Besides I already know how negative they see fat ppl. A few has called me fat before when we got into arguments. Not to put them because I've said hash things too. The ones we associate with know what buttons to push.
In the end its no one business. It's a private matter. No one has the right to know unless you want, not obligated, to inform them. I've never asked a stranger or someone I know a personal question expecting they have to tell me or I'll feel mislead or deceived.