Otherwise said, using full expression is not "diluting the thread".
It's explicitly in the guidelines that we don't complain about voting because it "makes for boring reading." Complaining about acronyms has the same effect.
It is way better when you see a question and answer just below. And bonus point, question and answer teaches others to not use all acronyms they learned in all the random subcultures.
It doesn't, because we don't have to read that.
Also the interpretation can be gleaned from context, as @williamdclt did above. It's unlikely that, reading the thread, the "TFR" being discussed is "temporary flight restriction."