So that means it's fetching the content (or at least the HTML portion) of every eligible link? That seems like potentially a lot of network traffic for what it does. Find if you have a fast connection, I suppose.
Can be even worse. I have seen some ugly corporate services using links with GET request to perform delete operations and having serious data loss caused by crawlers like this tool.
This was definitely a consideration. It was why there is a blacklist feature and why only links of a certain length and certain type are analyzed. Any suggestions can be made on github via a pull request.
Good point. There is some consideration for building an option to limit the number of links analyzed. So if you set it to 5 or 10, then the tool would stop at that limit. Feel free to open an issue on github.