Most people who "date" online and make it obvious to other people that they're "dating" are likely under the age of 16. It's a novelty to them. It's something new and it's exciting even.
What most people should do, is simply just ignore them. Usually, servers have a "/ignore" function built into their systems.
The point I'm trying to make is, it's just a game to the people who audibly make it known to others that they're "dating" another person who's online or on the server. Ignore them. The people who are actually dating won't advertise their status as such, unless asked.