Neutral:
* Naive: Lacking experience, wisdom, or judgment.
* Unsophisticated: Simple, lacking worldly experience.
* Impulsive: Acting without thinking, often leading to negative consequences.
* Careless: Showing a lack of attention or thoughtfulness.
* Inconsiderate: Not thinking about the impact of their actions on others.
* Unwise: Making decisions that are not in their best interest.
Negative (but not overly harsh):
* Shortsighted: Only thinking about the immediate consequences, not the long-term ones.
* Misguided: Holding incorrect beliefs or making decisions based on false information.
* Deluded: Having an unrealistic or distorted view of reality.
* Headstrong: Stubborn and refusing to listen to reason.
More specific examples:
* He's always jumping into things without considering the risks.
* She's so easily swayed by what other people say.
* He believes everything he reads online, even if it's clearly fake news.
Important Note:
It's important to be mindful of the context and your intention when describing someone's behavior. Avoid using language that is overly critical or judgmental, as this can be hurtful and unproductive. Instead, focus on describing the specific behaviors that you find foolish, and offer constructive feedback if appropriate.