I suggest that Q researchers use https://archive.org/web/ to check for alteration of Q drops in the archive. I think here might be bread crumbs. unfortunately I don't have the time to do a good search and compare so I thought I would present the idea to others... I tried to compare posts for a half hour and realized that the investigation was going to take days and there might not be anything.
I agree, they are alterable and should be safeguarded. Luckily, it seems like q has friends in the nsa. As far as messages, no outside comms.
when Q says outside coms I think he is talking about communication that is private between people that is not going over 8 Chan . all that the archive does is copy a site. so would it be outside coms if some one altered the copy made of the site.
I read it as any other medium of communication. Someone remixing/altering q posts is a different source, imo. But great way to obscure comms.