Notification that someone writes a similar topic

Now I’ve gotten into the “New” section: 3 topics about Punto Switcher 3.0 follow each other, written with a difference of 3-6 minutes.
Given that the posts were written for at least 3-5 minutes (if not copied ready), during this time, you can notify the writing user that at this second the user "such and such" writes a similar topic.

You can check the topic for similarity, for example:
1. Comparing the title and content of the topic to match words. Those. if the title contains “Punto Switcher” or “Punto”, then it is logical to assume that these words will be in the content of the topic.

2. Calculate the most frequent words in the topic (excluding prepositions), i.e. how to pre-select the tags that the user may prescribe for the topic.
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3. At the time of publication, do something like “Check the topic for uniqueness”, i.e. automatically run the tags and title on the base.

"Writers" at the moment can be determined by autosaving the topic every minute, not 5 minutes, as it is now. If the writers have matches of words or even phrases, we’ll display a warning message: “At the moment the user“ such and such ”writes a similar topic with the title“ such and such ”.

Implementation, of course, is not perfect, but how do you like the idea?