Haha, now that t-shirt - with no offense to it - is the sort of item I think staff could legitimately request be covered up. The rockstar's non-offensive tats however I think should've been fine.
Yeah i did offer to take it off! but was kindly told to keep it on!!
But yeah i agree as kids always read it and comment, i just forgot that morning that i was going to be on public transport i dont normally wear offensive clothing!