Here is an example. It is not a good one because of mistagging, but it is recent, and illustrates the point.
EDIT: The above is an even worse example than I thought.
This is by no means an uncommon interpretation and is leading, I believe, to SQL Server answers being given to any question tagged sql, even where another tag would suggest that the question requires a different flavour of SQL.
EDIT: Here is a better example, which I think illustrates the point I am trying to make.
The tags are
ms-access and one respondent breaks his/her answer down into two parts, one answer for
ms-access, one for
sql, which use SQL Server syntax.