This is a very thin ice, only those equipped with thorough understanding what TCAS actually does and is capable of should entertain the thought. Also what the TCAS cannot do.
For the rest, follow the RA. Use standard phraseology. The knowledgeable ones would do exactly that.
With 25 ft S mode reporting the pop-up RAs are pretty much impossible. Daring to play a hero, not reacting is a scenario the TCAS can work with quite safely.