> you think click bait and trolling have increased dramatically
Assuming "click bait", "trolling" and "dramatically" are all either explicitly defined or implicitly defined by consensus or what have you, this would not be a matter of opinion but of fact, so stating "I think" would either be incorrect or would be an admission of uncertainty about whether the fact is true. If he is correct and honest, he has no reason to add the phrase. If he is dishonest or incorrect, he has reason not to add the phrase.
Additionally, in the context of the full sentence, it would imply that the subject pronoun "this" is causing his thoughts rather than causing the object of his thoughts, but I know what you mean. I think.
Assuming "click bait", "trolling" and "dramatically" are all either explicitly defined or implicitly defined by consensus or what have you, this would not be a matter of opinion but of fact, so stating "I think" would either be incorrect or would be an admission of uncertainty about whether the fact is true. If he is correct and honest, he has no reason to add the phrase. If he is dishonest or incorrect, he has reason not to add the phrase.
Additionally, in the context of the full sentence, it would imply that the subject pronoun "this" is causing his thoughts rather than causing the object of his thoughts, but I know what you mean. I think.