I mean, you could install a character pack that has variation and then there is nothing they can do about it.
I think a few years back I've seen articles about AI that can mimic your handwriting, including errors.
Edit: Could be this
The text turned out by the algorithm created by Tom Haines and his fellow UCL researchers is authentic enough that human judges are unable to tell the difference.
Also, 2016 was 7 years ago? Damn.
It's actually a lot harder than you think. Stuff I Made here tried it. Fun little video.