Is "shoaling" cars permissible or rude?

There is the shoaling other cyclists thread, but what is the opinion of doing it to cars sitting in traffic?  

I commute fairly often and the section of Milwaukee can back up well over a 1/2 mile, of which I have no interested in sitting huffing someone's tail pipe on my bike.  The sidewalk is off limits because it is in Niles and I have been politely told that I shouldn't be on the sidewalk unless I am a kid or a little old lady.

I feel, not in an elitist way, that moving to the front of non-moving traffic is permissible as a cyclist.  I will safely make my way up through traffic as it sits still, but should we be sitting in traffic and waiting with the cars because it could garner more respect?

Or, as quoted below (because I couldn't have said it better), shoal them cars?

EDIT - In cases where this is no bike lane, because when we have our lane it's different.

J.A.W. said:

We will shoal the f#ck out of that car if you know you can fit between cars to get to front of the line.