It could potentially be a good statement of intent from Scottish PEN. Braver than might have been expected in some ways. Unfortunately it doesn't clearly acknowledge where the awful "sustained online smearing and harassment" against Jenny Lindsay is coming from and why, and who is causing writers to not "feel confident in their ability to express themselves without fear of harassment or violence." Such threats must be condemned without equivocation or hesitation, and can never have a justification, regardless of the merits of an issue.
Until PEN recognise that, they won't understand that there can never be a "healthy literary culture," or a healthy society for that matter, when appalling behaviour from unhealthy elements is tolerated and not condemned.
PEN should be defending freedom of expression for writers without exception. A line like "It is important to recognise when writing stretches beyond offence and can cause real harm to others, and work needs to be done to stem the perpetuation of hatred online" suggests Scottish PEN aren't quite there yet.