I usually say something like- "Clear active 30" or some such. This in my mind tells people approaching the airport, which runway most people, or at least more than just me is using. I use the word "active" to indicate that numerous people at the airport are using a particular runway.
If there are really "numerous" people using 30, don't you think all their pattern calls (x-wind, downwind, base, final) mentioning "30" would tip off approaching pilots that most are using 30? If there's nobody else in the pattern and you just cleared the runway, it doesn't matter a damn bit which runway they use. This "active" stuff is mostly learned procedure monkey stuff that pilots say without thinking. Monkey hear, monkey repeat.
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