So this is an interesting issue - especially when soliciting opinions from a group (IT) that largely screamed bloody murder when it was suggested that Spec Miata's be LEGALLY placed inside their respective IT class (ITA or ITS at the time).

This is very similar in application. Follow the logic:

All IT cars can compete in STU in legal IT-trim
All IT cars fall 100% inside the performance envelope of STU
MOST IT cars fall within the rules of STU

So, as in the case of SM's in IT, you have an 'allowed' class, well within the performance envelope of said class, but with attributes that are not allowed by the classification process.

To those who are in STU and don't get it - the 'philosophy' is to allow other, non competitive cars a chance to double dip and fill up your run groups. To those who had issue with SM's in IT - you should be against this allowance as well, no?