Curious to know the basis on which they were arrested. I guess it's something in the realm of criminal damage to public property. But that would imply that Maestri's bolts had become part of the public property that is the mountain. I assume Maestri was not arrested for inserting the bolts.

Not being a mountain climber at all I don't really have an opinion on this, but I do naturally sympathise with the anti-bolt guys because I am fond of the idea of leaving no trace.