I clearly missed something - is it really that "harmful, pointless, illegal and unsavory" to have a domain that's not in use showing an ad? Yes, it's a misuse

I clearly missed something - is it really that "harmful, pointless, illegal and unsavory" to have a domain that's not in use showing an ad? Yes, it's a misuse of adwords, but he could have used a more appropriate ad service. I doubt he's a squatter since 1. it sounds like he's only doing this on one domain and 2. the domain was related to his company name and wasn't some other company's name (correct me if I'm wrong here) or a misspelling. In the article, he says his company is "think" and the link was related to that. To me, this is not squatting.