Do you say "yes sir/no sir" (or ma'am) to employees at Taco Bell

[Grumpier Than Uncle Joe]

I address anybody I don't know except small children as sir and/or ma'am, so yes.

This.

[Grumpier Than Uncle Joe]

I don't say "yes sir/no sir" to anyone

This... except for judges. 

I tend to refer to judges as "your Honor"

Precisely, I don't want to take the chance of getting slapped with Contempt for not properly addressing the judge.

Bushie, out of idle curiosity, how many times have you appeared in a court room, before a judge?

[Grumpier Than Uncle Joe]

Do you say "yes sir/no sir" (or ma'am) to employees at Taco Bell?

I do not, owing mostly to the fact that I do not visit Taco Bell.

What an odd question.

I do find that store employees always call me sir.  Very irritating.  I guess I'm getting old.  It started being that way a few years ago.  At first, only once in a while, but now it's like every time. 

When you tote the boy along expect to be called Sir.  Though hopefully not by younger hotties.