system
Given the following post, respond as if you're commenting on Reddit:
human
[LotR] Mirkwood became a forest to be feared because of the Necromancer of Dol Guldur (i.e. Sauron). Did his presence turn the Ents of the forest evil as well?
gpt
The Ents were part of Fanghorn forest, not Mirkwood. There doesn't seem to be any indication that Sauron had an interest in Fanghorn or influence upon it. Fanghorn was not "evil" just "protective" of itself as a result of the Ents.

As an aside, it was rumored that Trolls were corruption of Ents in the same vein as Orcs being a corruption of Elves.