We had a guy in Australia trying to use our trademark, in the US they would call my bluff and I would have to spend tens of thousands to hundreds of thousands to sue. In Australia we sent a polite letter, outlined our case that was pretty clear, reminded him he would pay our legal if we escalated and made it clear we would, and the result was immediate.
In short, companies shouldn’t be incentivized to play game theory on whether or not you will sue me if I trample your rights.