I don't really have any concrete suggestions, but it seems that a lot of the questions where people not entirely familiar with the purpose of the subreddit who are asking general "philosophical questions" tend to use the 'logic' tag on their posts, perhaps not realizing that it has a very specific meaning in philosophy.
As someone who is here primarily for logic, this is a minor annoyance, especially when I'm getting email alerts for stuff that is essentially noise. Is there any way to improve this? Or should we just assume that these users are likely going to post off-topic questions that will be closed/removed anyway and so it isn't a problem?