I have a few times in my life just to see what part will cross with what or some other stupid question. I have owned Subarus all of my life so I know the local parts guy pretty good. He has even gone as far to run a VIN or two for me to look up service records.
Anyway, I call an Audi dealer to ask about service intervals on the timing belt. Just one simple question and the service guy hangs up on me when I start "I have a quick question I wanted to ask...."

This has happened to me more than once.

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R