... several people start downvoting communities they don’t even participate in
Could you elaborate what you mean by that? Does "participating" mean subscribing? Commenting? Posting?
Also what does "downvoting communities" mean? People go in and downvote every post?
They seem to be 'liberating' comics from all kinds of places. I'm unsure how to feel about that. On the one hand having everything in one place is nice, on the other hand I feel a link back to the artists site is an absolute minimum, even if you ignore that some of those live behind a paywall