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The point is relative to toxicity.
You have basically made two points. You don't want Trackers to exist so that players can't blaze through content. But if a Combat Log exists and a group chooses to combine their logs, a Tracker exists.
You don't want people tracking other people. That is avoidable if somehow logs are very carefully set, but then people might just refuse to let others join their guilds because of not providing logs. This would be fine and your goal would be achieved IF the first thing wasn't true.
If there is a Log and people can share their logs, you cannot prevent the effects of a Tracker that you're concerned about.
EDIT: At best, you can sorta-prevent the effects that
@MrPockets
is concerned about, but at that point, Noaani's suggestion is very slightly better.
Because parsing logs is not hard. The only reason people don't know that it isn't hard is because Trackers are basically a one click solution whereas Parsers require you to type two lines and open Excel (opening Excel might be optional)