I don’t think there is any particularly bad message conveyed in those books. It’s based on a pretty mild liberal, world-saving attitude with some comical characters. It surely does not portray alcohol in a positive light, but rather as a tolerated nuisance.
Most comics are cheap versions of reading, and aren’t great for advancing language arts. Jewish comics usually carry some story of message, at least. Tintin comics hardly has any.
And so, I don’t “ban” this at home. My kids borrow it at times, and they know that it is cheap and just fun. Like jellybeans, once in a while it is fine to have some, but don’t eat them for supper.