It is an option check box that a moderator can check when moving a thread. Most of the mods will check it when there are replies to a thread just incase any of the responders wishes to go back to that thread. It is easier to deal with doing so than to deal with an individual(s) that is(are) trying to find a thread that they know was in a specific category and now is not.
The option check box does not care if you are subscribed to the thread or not.
The best solution for you or anyone would be to create a spam filter if you don't want to deal with the emails.
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Requiescat In Pace AMD Processor Forums | Member since: 1/19/2009 | Post count: 4142
Please don't PM me with questions, instead create a thread so that everyone can assist and benefit from the knowledge provided. Thanks in advance!