We are experiencing similar issue as this huge discussion Spam filters registering clicks? . However the situation is slightly different from what's reported there.
Today, after sending out an email, more than 20 leads were qualified as MQLs based on lead score they (or the spam filters) earned. In my case, they did not have "opened email" activity but have "clicked email" and "visited webpage".
I was thinking to tweak the global lead scoring for Click activity as
Clicked email is ANY
and, Opened email is ANY
then I realized that this filter may still add score for Click if someone opened Email A in person in the past and a spam filter clicked Email B that was sent out today.
Is there any way to set the trigger with Opened Email B and Clicked Email B in the global lead scoring smart campaign?