There's a player who keeps pinging me on plurk about me threading with their character, but I don't like their rp style. They often put my character in tricky situations, where they contradict what my character is saying or doing (eg. My character is looking for a food in a bakery that they regularly visit. The next tag is their character telling me that the bakery hasn't stocked that cake for years).

I'd be happy to stop threading with them but they keep pinging me for stuff. Do I tell them why I don't like tagging them? How do I do that without being a dick? I like them. I just don't like their tags.