Purposely sending signals into space is akin to a 5 year old kid calling random people, telling them he is home alone and what his address is.
That's assuming there are actually other adults out there, and that if they are that they're capable of doing anything about it (like if the kid lives in US and the adult is in China), and also that the adult even cares.
On top of that, you might say that the kid has already had phone calls going out for decades, but no one has showed up yet.
I don't think sending out messages now is going to make any additional difference on top of what we've already sent out and will keep sending out. And I don't think that there's anything remarkable enough about Earth or humans that any civilization advanced enough to traverse the stars would even bother, much less be needlessly hostile over.