<p>Adding r tag to the question syntax highlights the R code present in the question or in the answers. Examples <a href="https://stats.stackexchange.com/questions/3779/probability-of-not-drawing-a-word-from-a-bag-of-letters-in-scrabble">here</a> and <a href="https://stats.stackexchange.com/questions/6111/the-probability-for-two-people-to-provide-identical-answers-on-survey-questions">here</a>.</p>

<p>On the other hand questions tagged r imply that the question is related to R. So if somebody gives an example of R code in answer it is desirable that it should be highlighted, but it may be undesirable to tag the question with r tag, because the question is unrelated to R. </p>

<p>What should the policy be in this case? Should we simply add r tag with explanation, or add explanation in r tag wiki? Or maybe there is other way to indicate that answer needs special highlighting without adding additional tag to the question? Note that this applies for other programming language tags.</p>

<p><strong>Update</strong>
Note that I am only asking for an opinion and not advocating one approach or another. I felt that my language was not very clear in expressing that, hence this update.</p>
