Do you check if your pinterest proxy is being blacklisted?

Ok, most of pinterest marketers use proxies for creating/pinning pinterest accounts, but how to check if the proxy is not blackilisted? I checked for test xx residential proxies from smartproxy here and most of them blacklist status was positive. So what do you think about that kind of online tools for ''checking'' blacklist IP status

My home ip shown the same result as in your screenshot, and of course my home ip is not blacklisted!