I think he's talking about the previous posts regarding taping shutdowns, taping gear being confiscated, etc. Some smartphones are able to pull out good recordings nowadays, that's why he says "there's 15.000 [potential] recorders in there". Guards can confiscate one or two recording devices, but not 15.000
The European leg is coming! If you want to tape some concert(s) and don't know where to start, this is your place!
Summer is always a good moment to get second-hand gear on the cheap... So don't leave it until it's too late, and get your hands on some recorder and mics NOW and go practice so you're ready when U2 comes to town!
"I can't tell you where we're about to go but I know that I can't sleep at night with the thoughts of it. I'm so excited about this idea that we've just begun - the way I feel is that we're undertaking a real departure. I can't stop talking about it. It would take about ten men to hold me down at the moment."
- Bono, 1984
did you know
U2 made their first appearance on US television on Tomorrow hosted by Tom Snyder. It aired on June 4, 1981, and the band performed "I Will Follow" and "Twilight", followed by an interview.