Yep, this works for me too.

As you said, taking the time to write down your thoughts, read them back, proofread, etc, gives you time to cool off. When you're calmer, you're better able to engage your critical thinking skills, and that's usually when you realise the person isn't worth it or they may have a legitimate reason for thinking differently than you.

Sometimes I react adversely, but intentionally so, when I feel a point needs to be made. I had one person take it badly that I use dark mode and a particular screenshot I posted wasn't suitable for people with vision impairment. I took that opportunity to point out that, rather than playing the victim, they could just ask nicely. On the internet, just about all disabilities are invisible.