light i dont think so, it would dissipate to quickly imo. "noise" MAYBE, but it it would have to incredibly strong signal

voyager 1 & 2 are now in interstellar space and are cruising along. And, really can only give the the smallest of data. and the more deep they get the signal is going to interfered and get lost.

Anyone who thinks ET is going/has visited Earth needs to look to the time it would take to travel here.

Its just too long...many earthling's life cycles.