When it comes to real life events, Reach is very important because it creates AWARENESS.
People must be AWARE of your event before participating or expressing interest.
A good way to promote your event is through organic content such as:
Giveaways.
Posts.
Memes.
Partnerships.
More exposure, more hate.
What You have to do?
Deal with it with elegance and class.
Do not go down there.
Do not play their game.
Haters are your fans.
But they don't know that yet.
You CANNOT make everyone happy.
Do your best, provide value and quality and don't go so harsh on yourself.
It goes the same with haters and hateful comments.
When You have your own voice, step up and provide, there is a slight chance of getting hate comments.
When the customer told the Bible seller "I don't have any money.", the Bible seller had the best reply:
"Put your hand here (on the Bible) and say that again."