I love martial arts threads.
Yes. There is a risk of injury. But the benefits way out weight the risks in my opinion.
Specifically the wrist area does get put under a lot of strain in Aikido and related arts, but I've yet to hear of a permanent wrist injury yet. You don't have to apply much pressure to the wrist to get your opponent to flip their whole body. This is a natural reflex so as not to have your wrist broken.
Go get em bud