Question: Going off this question [here](https://stackoverflow.com/questions/26537486/radio-button-clears-text-boxes)...

Is it ok to give a jQuery answer if the OP has tagged jQuery, but does not use it in their code? It screams "mis-tag" to me, versus "gimme dat jQuery".

More or less, should jQuery answers be valid on a mis-tagged question?

(I use the term valid loosely here, as technically all answers that aren't spam or off topic are valid)

Answer: 
I tend to agree with this author's rationale [expressed in his comment in a discussion on this subject:](https://stackoverflow.com/questions/30896297/onclick-function-in-javascript/30896696#30896696)

> 
> The only person here that should have issues with my answer is the poster then. Not you. I told him/her how to do it in vanilla and offered a much simpler way using jQuery. The poster can decide if he wants to use it or not.
> 
> 
> 

JavaScript questions never *require* jQuery; C++ questions never *require* Boost, and I suppose it may even be possible to answer Perl questions without referencing something on CPAN. That said, there are many, many questions where the use of a tool or library makes the solution considerably easier or less error-prone; if we could not have answers that demonstrated this, the site would be much poorer.
If you feel that the answer isn't helpful, you're more than welcome to downvote it. If others feel that it is a helpful answer, despite using a tool not mentioned in the question, they may upvote it. Everyone is free to provide the feedback they feel is most appropriate.

Your first comment certainly isn't inappropriate. Indicating that the answer is problematic because the question doesn't mentoin the tool used is certainly feedback you can choose to provide.

The answerer's reply of "can't you read" is starting to push the bounds of being constructive. I could certainly see it meriting deletion by a mod.

When you reply with "Are you stupid" we've now clearly devolved completely past the point of constructive discussion and into childish name calling, and nothing productive is likely to be accomplished at this point forward. Had you removed that inappropriate name calling from the comment it could potentially have had value; if you had been able to clearly and *constructively* explain why you feel the answer is problematic, then either the author could use that feedback to improve their answer, or other readers can use that information to judge its quality. But when you open with personal insults, the odds of anyone actually reading/discussing anything after it constructively tend towards zero.