It is inappropriate to send a thank-you note after an informational interview because the person you talked with will think that you're hinting for a job.

It is not inappropriate to send a thank-you note after an informational interview. In fact, it is considered polite and can help you make a good impression with the person you spoke with. Just make sure that your thank-you note focuses on thanking them for their time and insights, rather than directly asking for a job.