Forcing visibility

[Matthias]

I was debugging horizontal overflow and eventually found out it was caused by an invisible element, so pesiticide wasn't really helpful there.
Is this something it should be doing? Did you already consider forcing visibility?
Perhaps in an aggro-mode?

This helped in my specific case:

*, *:before, *:after {
    outline: solid 1px red;
    opacity: 1 !important;
    visibility: visible !important;
}