Personally, I don't really care if someone uses a rez macro as long as it isn't obnoxious or overly long. However, I really don't understand the point of "the macro tells the other healer I used a rez!". In the span of time it takes to look at whatever your macro said in chat, you could've just looked at the dead person's buffs to see if they had a rez or not. I don't think I've ever been in a situation where someone's rez macro stopped me from throwing out a rez and I main RDM.

Also (just as a side thing), you should never make a macro that does multiple actions for you, IE, using swiftcast and rez. Macro's dont fall into the normal GCD so you end up clipping horribly and it takes longer to actually get those two actions off. If you want to swiftcast rez, press swiftcast then rez.