Dealers are annoying when trying to sell you a car, they are also annoyed when they have an idea that they want you to develop asap. We are annoying when we try to sell dealers stuff.
In the end I think it is a human condition: We must contact others to promote our ideas/service/product, others may not be interested at this time, like we care about that (both dealers and vendors)!

Just like love, timing is of the essence.
Alex, we don't have a "puke" emoticon!