It always confuses me when people start talking about privacy and rights on our server. You have none.
You only have an expectation of privacy in a private place. (which includes private communications) This is our server, not yours, so you have no privacy. We can do whatever we want. That being said, we're talking about logging public chat here so it doesn't even apply.
By the way, if anyone uses /report every 3 seconds spamming GMs with logs, there's no reason they shouldn't get kicked or banned if they keep it up. Spamming in any form like that isn't allowed, even if it's only spamming the GMs. (ditto for people creating thousands of petitions)