While I don't know if they are on ROTR that type behavior sounds like Axl. Maybe GnR is on RotR 2013? Afterall, they did have Slash play last year and after GnR completes their Australia tour with ZZ Top and Rose Funeral they have nothing listed on their website for future tours. Just a thought...
5-18 Lamb Of God
9-05 Iron Maiden, Megadeth