> even government organizations/departments/agencies can be "local" and scattered (e.g. similar IT departments for each "canton" in Switzerland) and not have huge amounts of resources/knowledge to track/identify perpetrators of all ongoing (sophisticated?) IT crimes => somebody somewhere might see the same IP involved in a lot of "bad" stuff not realizing it's just a TOR node.

Decentralization is not an excuse for negligence. Anyone working in cybercrimes should be aware that Tor exists and of what it is. The list of exit nodes is public. Harassing the operators can only be one of malice or incompetence and neither alternative is excusable.