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Nobody is using email obfuscation because it was found to be ineffective. Using OCR to read emails off images and Selenium allowing you to script a browser as though it was operated by a human there's no effective method of obfuscating email addresses that's anywhere close to being halfway effective against spammers. While you can block most spammers from your site using any number of tools and methods you won't stop them all. Even if you could, your email address would end up in your clients' address books. The same clients who happily upload their address books to any odd service asking them to. The same clients who click on dubious links and have their address books siphoned out to God knows where. The same clients who use cheap (and some not so cheap...) Android phones with spyware preinstalled at the factory.

You just have to live with the fact that your email address will eventually end up in a spammer's list. All you can do is have a good spam filter on your email server and client. Anything else is largely a fantasy.

Using a contact form is your best bet but that, too, doesn't mean that the associated email address will never receive spam. It will just stall it a little more.

Regarding your question, Admin Tools will block the user agents listed. Nothing prevents a spam bot from impersonating a legitimate user agent to work past this restriction. It is quite trivial, really.