[epivosism]

I always imagine there is an "intro to forms programming" which includes code to disable copy and paste, and its concepts now have thousands of descendants across the web, to the point that people start imagining it's a security measure and proactively copy it. I agree w/you and don't see the point in stopping users from pasting in the first place.

[mgkimsal]

I don't think it specifically violates any accessibility regulations, but preventing pasting has always come across to me as an accessibility violation.