No, we haven't been. Of the signals that escape the ionosphere, all are indistinguishable from background noise by the time they reach Alpha Centauri. We're only really broadcasting within the solar system and a little beyond.

Even if we had been broadcasting a very strong signal from the first radio experiment in all directions into space, that would still be less than 0.1% of the galaxy.

We're fine. Aliens aren't watching The Honeymooners.