Suggestion: Impersonating an account should not affect "last seen" date

[michaeld (Michael - Communiteq)]

@Krunnie

of where the admins behind those forums would maliciously use ”impersonate” to try to get people into trouble

Admins could always reset that date in the database anyway, or prevent updating the last seen date using a plugin. If you cannot trust the admins then there is nothing you can do.