Money is an incredibly sensitive subject to a lot of people. I tried to convince a few peers in my early 20's to hold off on the lifestyle inflation, never with a good reaction, so I gave up. Best to fly under the radar and blend in. Now that I am telling friends about my plans, a few have asked for advice, but I am sure there is some jealousy, too. I try not to talk about it too much, but it is hard. One of my best friends that knew about my plan from the beginning simply said, "Doesn't surprise me, you have talked about it forever" and that was it. No high fives, no hell yeahs, just business as usual.
This FIRE thing is awesome, but it really throws most people through a loop. When you talk about it, many people probably feel as if they are getting a lecture, a sales pitch, or you are bragging. If someone feels that way there is no way to win.