No. But what I find funny is how it appears that the dress code is inconsistent between the various events. I don't know who determines what is appropriate, but it should apply equally regardless of which group is attending.
I have a couple of West Coast Bash shirts that would be great to wear---in fact, I just might go ahead and wear my Tatsu one or the X2 one. Both have logos from SFMM rides, so they should be appropriate in my opinion.
Eric