Sending the screenshot to everyone feels powerful for a minute and petty for a year.

Forwarding something private is a very short high with a long tail. For a minute you are the person who has the thing everybody wants to see, and after that you are the person who forwards things, which closes doors quietly. The people laughing with you are also recalculating what you would do with theirs.

When you are about to send it, put the phone down and wait until you are no longer enjoying the idea. If somebody deserves to know something, tell them directly rather than broadcasting it. What you keep to yourself is most of what makes people trust you.