Extreme obesity

I’m just wondering if anyone has any advice on how to get over reactions from family and friends to extreme weight gain.

I’ve just began my (hopefully) extreme gain and I’m kind of scared about what my family and friends may eventually say.

Has anyone dealt with reactions to their extreme obesity before, and how did you deal with them?

Anyone who is not in total and complete support of your gain has no place in your life, if they aren't actually working towards making you fatter then you have no reason to have them around and should cut them off, this goes for friends, family, ect

You decided to gain weight, and the reaction of your family and friends shouldn't affect you.
I'm warning you that no one is going to congratulate you or react pleasantly.
I don't know what you mean by extremely obese, but if we're talking about being over 600 lbs, you're not going to go unnoticed anywhere.
At that size, you'll be exposed to uncomfortable situations all the time, which will generate reactions from onlookers.
If you're worried about people's reactions, just don't do this. Everyone will remind you that you're incredibly fat, that you should lose weight and stop eating. Besides, the fact of being extremely obese and being observed eating or sitting already generates reactions. Not to mention if you appear in public eating and sitting in a wheelchair.
When I could walk, I used special public transportation, and there's a double seat designated for obese people. When you get on and people have to give up that spot for you, they don't look kindly on you. To people, you're a lazy, unproductive fatso who takes advantage of the system, and on top of that, the system itself encourages you to continue with your lifestyle.
You don't need to prepare yourself unless you're not confident in what you're doing. I've always taken negative comments as a compliment.