You missed my point. Courtney and Dale are both names that either a man or woman can use, like Leslie. So an hypothetical phone order would not be lying. However, we haven't determined if the said couple are Christian, and we do not know if they know of the baker's convictions.
You have been talking about sin SIN SIN since you came across this thread. A person's sexual behavior can be sinful, but that goes to any sex act, be it a man forcing himself on his wife when she isn't in the mood to a woman raping a 17 year old and then discarding him on the side of the road (although the kid might think he got lucky, for a while).
Even a wife saying "Frank, I've got a headache." is sinful if she doesn't have a headache.
What I have been talking about (and you don't seem to perceive) is rights. If it is within a person's right to buy a frilly dress, it doesn't matter who is going to wear it. Maybe he is, doing a drag number at a gay bar. Maybe he is buying it for his wife. You don't know. Nor can you discriminate because the dress might be used to "celebrate" a sinful act.
Even though gay marriage was (at the time) illegal in Colorado, it was legal in Massachusetts, and the whole "full faith and credit" clause in the US Constitution. At the point where Mullins and Craig entered the bakery, that law was in effect. There seems to be no public record that Craig or Mullins knew that the baker had a no SS wedding cakes policy. The policy was NOT posted.
Frankly, if I walked into a bakery that had a notice posted in the wall saying, "Baked Goods will not be served to monastics." I would walk out without saying a word. I might call a lawyer, or a TV journalist and tell him/her about it, but I would have nothing to do with that bakery from then on. And I would call all of the monastics and religious hermits in town and tell them about it. You haven't seen how impressive an Orthodox or Eastern Catholic monk can be in full habit. Ten or fifteen of them, standing on the public sidewalk outside his establishment, praying can be very impressive and intimidating.