>2) the reasons that people enforcing the rules on Wikipedia ignore incivility, harassment, and trolling is because that >approach is often the best way to stop attention seeking behavior. The idea to "not feed trolls" is well engrained into the >culture and advise given by mature and experienced people on the Internet.

Or you can just block them firmly when they deserve it, escalate if and when you need to block them again, revoke their talk page access if they continue to use it to troll or harass (they can still use OTRS to request unblock; however, it’s amazing to see how much humbler they get when denied an audience), semi-protect pages they continue to use IPs to make the same problematic edits to and generally make it clear to them they are being eased away from the community. I realize there *is* a small percentage of such users that this will not stop, but in seven years as an admin I *have* seen this approach work much more often than not, regardless of whether said trolls were harassing me or someone else.