Good catch. There's another more detailed response I just left to a similar comment, but the TLDR is that we do some logging of metadata of the dataframes passed to the tool, and what features are used.
If you're interested in using the tool without any logging, just let us know and we can make sure to turn it off for you!
However, I installed the package locally, and I see that importing it causes a request to be sent to segment.io.