I can't find any info if is it dangerous to put a drive to other pc
Before anyone tries to answer that, we need to know what you consider "dangerous" to mean.
If you're concerned about the contents of the files you've put on the drive (including any metadata that may be attached to them), you need to abandon this entire idea, because there's precious little you could do to ensure the safety of that data. The files should be considered compromised as soon as you plug the USB drive into the unknown PC. Software on that PC could easily copy, store, modify, or send your files anywhere.
If you're concerned about making the USB drive safe to use in the future, you need to at least be cautious. Taking that drive home and sticking it into an average personal computer would be dangerous, as the drive could have been infected by malware that could spread to your PC before you had a chance to format it. This malware could then potentially cause problems by corrupting or stealing personal information on your PC via a variety of methods.
Information Security professionals and enthusiasts commonly get around this risk by "nuking it from orbit" - either literally destroying the USB drive after using it, or accessing it from a system designed for dealing with infected media and then securely erasing it. Many times, these purpose-built systems are just a boot disk with a lightweight OS that's pre-loaded with security tools - but, crucially, has none of your personal information, and no access to your personal information.