Avoid deleting messages when unsubscribing

[forovalencia]

Hi. Is there any way to avoid deleting all your messages when a user unsubscribes from the forum?
It happens that sometimes, due to the heated debate, an angry participant unsubscribes and deletes all his messages with malice, leaving whole threads of debates that are really important and not nonsense unused.
Any suggestions?

a greeting

[GregChapman]

This topic may provide the answer. I haven't tried it.:
http://support.nabble.com/Delete-Post-only-if-Admin-td7590050.html#a7590051

[forovalencia]

Thanks, I could do it with the following modification of the macro can_delete

<override_macro name="can_delete" requires="user" dot_parameter="node_attr">
    <n.both condition1="[n.not.is_banned/]" condition2="[n.is_site_admin/]"/>
</override_macro>

regards