The general issue about different types of proxies and their levels of protection is fairly common knowledge if you've read much about proxies.
And ScrapeBox's proxy checker and management is one of the best in-built proxy tools any app has, it does the job very well for identifying proxies in sbox - if you use it correctly (which isn't that hard, reading is fundamental). Also, if you want to use proxies outside of sbox, or if you want to be really careful, or whatever, run the IP's you have through Charon. It's that simple.