Comment by gmueckl

A quick search seems to indicate that yes, you might be responsible for linking to the altered content. As a website author you have - in principle - a duty to check what you are linking to. It is unclear what that means in practice. I would guess that it would involve a test if timely detection of alteres content on the linked site would have imposed an undue burden. The only part that is absolutely certain is that a website owner must react if they are notified that they are linking to illegal content. Other than that, it's seemingly a grey area.