Out of the loop

Gish galloping is talking over the person you're arguing with to tire them out and / or interrupt them

Commenting with long text walls asking someone to refute this or that or respond to a series of questions is usually the online equivalent of that

You​ ​​ever ​​​see​ ​​those​ ​​comment​ ​​chains ​​​with vеgаns constantly responding to someone until the person they're responding to gives up, that can be considered Gish-galloping

Obviously with online comments you can't talk while another person is talking