Yeah, it's the world we live in now. With internet trolls and what not, a lot of people just tend to voice their opinions even negative with no thought to others.
As they used to say, if you don't have anything positive to say, don't say anything at all. At the very least be polite.
All of us waiting for our cars are excited and would like to share with other people, but I guess you just don't know whether it'll be interpreted as showing off or if it's just them being a miserable ****.
Safe bet is just share it with people you'll know will be happy for you.
Even then we buy these things as a reward for ourselves not for other peoples approval. (Although it's nice to get some validation
)