Let's say there is a "honeypot relay". Beyond capturing the IP in access logs and trying to match that to an event timestamp, what more would be a concern? I'd just treat any relay the same as any clearnet service, like an ISP. Except the relay is only seeing a fraction of what you're do as it's only notes. If anything, I'd be more paranoid of the VPN provider...
Discussion
I would never trust my ISP mostly because I know how they handle my data (have friends there) when they receive a simple E-mail (not a warrant) from my government. But I know for sure that in other (2-3) countries the routine is the same. They just simply give out bulk data based on any governmental request.