I collect content without permission for WP Struggles*. Please visit the original sites, especially to share and comment.
WordFence is not a plugin for novices or amateurs. It isn’t a bad plugin, it is well-developed, supported, and maintained. It is powerful and will take your site down if not used with proper knowledge. If you simply remove WordFence your site will go down – there is a process to follow with that too.
I do not know why I installed WordFence again. It does permanent, difficult to remove, changes to your WordPress install. Cuts off my access using XML-RPC to WordPress.com thru JetPack. Also, that means I can’t use apps to create posts. And more things that I do not recall. Even following the uninstall process and using a plug-in to remove WordFence files, there are still undone changes to the wp_config file.
Fortunately, tech support at WPMU removed the Wordfence stuff, twice. One tech was very familiar with WordFence. Whew!
*My WP sites serve as my reference collections and notes for everything I do or have interest in for my use only. I use copied content on this MultiSite network toni-two.com and my ESL MultiSite at toni-esl.com.