How to handle tags with multiple meanings?
I was looking at the mex tag on Stack Overflow, and I noticed that two completely different topics were being tagged as "mex". Roughly two-thirds were using MEX to discuss MATLAB MEX-files, which are C/C++ and Fortran extensions for the MATLAB language, and the other third had something to do with Web Services Metadata Exchange (something I'm far less familiar with). Is there a protocol for handling this? Does it matter?