"The premise of 'don't feed the trolls' implies that if you ignore a
troll, they will inevitably get bored or say, 'Oh, you didn't nibble at
my bait? Good play, sir!' and tip their cap and go on their way. Ask
anyone who has dealt with persistent harassment online, especially
women: this is not usually what happens. Instead, the harasser keeps
pushing and pushing to get the reaction they want with even more
tenacity and intensity. It's the same pattern on display in the litany
of abusers and stalkers, both online and off, who escalate to more
dangerous and threatening behavior when they feel like they are being
ignored. In many cases, ignoring a troll can carry just as dear a price
as provocation."

https://www.theverge.com/2018/7/12/17561768/dont-feed-the-trolls-online-harassment-abuse