Please don't. This feature is a heuristic for reducing low-quality clutter (in the global comments feed and on the post pages). Assuming it usually works, precommitting to upvoting hidden comments amounts to precommitting to reducing of the average quality of the visible comments.

(The hidden comments are visible under the "comments" tab of user pages, just not under "overview". Wei's tool can be easily fixed to look at that page instead of "overview".)