I wouldn't think that any paddlers would look to Paddle Canada to make complaints or to provide information on that. That's not our mission. The answer is no, I'm not aware personally of any complaints or litigation from paddlers.
Anecdotally, I know that paddlers talk about dams or weirs that appear across rivers and can be quite dangerous. There's no signage and it can present what is technically a “hydraulic”, which does not look like a very threatening body of water but can in fact trap boats and swimmers, and people do drown in them. There are problems, but we don't receive complaints.