Every once in a while, I optimize databases and take a look to see if previously installed plugins or any updated plugins have left orphan tables and other leftovers. 

Upon reviewing today, my Database optimizing plugin says it found over 74 orphan tables on our databases! And what's worse, most of those tables are set to "autoload" which can for sure cause pages to load slowly.

Before I go ahead and just delete them, I want to make sure these are really orphan and not an error or false positives by the databases' optimization plugin.

Now, some of the tables were actually created by WPForo, so I'll go there and ask them about those, but the majority were created by WPDiscuz.

Thanks in advance.