[Alex]

If the aliens are listening they'll have heard it all before, it isn't like we've been bleeding RF transmissions into "deep space" for 100 years or anything.

It's a lark but if that's how they want to have fun, then cool.

However, it gives us about 430 years to find the ways in which we're wrong about how the universe operates so that we can have somebody there to listen to it when the signal arrives.

I can imagine, in 2439, Steve (for if we can travel faster than light surely we can live for hundreds of years) stumbling across this long forgotten stunt and demanding on a Polaris swanking to hear Across the Universe from Across the Universe (and I'll pipe in pedantically that 430 light years is hardly "across the universe" and Kevy will pipe in to somehow make a penis joke and NA will say "can't go, just added our 4,306th pet to house and she needs to be walked").

Of course, I've long had a fantasy of using FTL space flight for really stupid purposes such as finding (by calculating the wave front) and re-recording the old lost episodes of The Tonight Show or something like that.