[trentlott]

Yes, for native speaker would not happen that they change writing from normal fluency. What gain can be from changing normal grammatics or to use left hand?

Verily the poorly-skilled can never write better, and the better never poorer.

But are there known 'kidnap ransomers' that could be deduced through language? It seems unlikely, I guess, unless Norway has enough local variances that would give a native speaker away through dialect.