[thetest3r]

Instead of an initial, I'd recommend putting an emoji in the first name. (And putting your last name as your full name). I've been able to filter out most "InMail/auto" when they say something along the lines of "Hi {emoji}."

I learned of it here: https://www.glennstovall.com/the-wolf-test/

[seanmcdirmid]

A Chinese 囧 works great for emoji first names that will avoid emoji filtering on the other side.

[Tempest1981]

I wonder if a Unicode RTL marker would work? (but what if your name is a palindrome)

Or a non-breaking space?