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What kind of ethics is it to decide that these walls must be free climbed? If you want to do that, fine, go ahead and ignore the bolts.
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There is the "Leave No Trace" principle where you do not leave anything behind.

This is why you see in trad climbing the lead will place cams and nuts, while the last in the group on that pitch retrieves them.

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Sure there's this principle but this just moves the need for justification. Humans leave their traces everywhere so why this principle for mountains? There are many traces that should be removed such as hydroelectric power stations, river straightening and so on. Is this whataboutism? I just think a few bolts in a mountain don't do much harm and as a casual observer of these mountains you won't even notice. Also I am very much for "leaving no traces" in the sense that everyone picks up their trash.
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I don't think it's just a matter of ethics - some legal entity owns these mountains (park authority of some kind?) and drilling holes and placing bolts done without the permission of the owner sounds like vandalism to me.
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If you are being serious; read the tower for much more context.
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