I'm new to stack overflow, made a few responses. I responded to a question that was something like:

"I need to do X, I found a sed one liner that almost does it, but not quite"

And was tagged 'sed'. I assumed the user just wanted a solution and tagged it with sed because it was a possible answer. So I suggested an alternate way using another tool that was more concise and didn't involve regex (another one-liner).

I received a down vote for not meeting the requirement of the user.

Since I'd like to make sure I conform to good forum etiquette, my question is:

Are tags considered hard requirements that should limit the scope of responses? (within reason of course, a .NET question with a .NET tag obviously shouldn't receive a ruby answer).