Lately I've been having quite a few issues with the group finder, and more specifically the people using it, so I'm here to rant:

If you're going to queue into the activity finder to do group content, you need to be capable of pulling your own weight. I don't necessarily care if you're cp600 or cp100, buy I'm beyond sick and tired of being grouped with so-called "dps" that struggle to even pull 10k.
Had two dps in selenes Web vet tonight who couldn't have been doing more than 5k each, it was absolutely pathetic. It should not take 20 minutes to kill a boss with 5m hp.

People who queue into the activity finder only to constantly decline/cancel the prompt when a group is found: you are arse holes that shouldn't ever be using it in the first place. While you *** around, the other 3 people are stuck waiting with no way to kick your sorry backside to find someone more willing to actually do what they signed up for.

People who immediately leave after zoning into the dungeon, you're as bad as those above. Not only are you abandoning the group for whatever reason, you're also causing them to have to wait, sometimes exorbitant periods of time, to find a replacement. If you aren't interested in doing a dungeon, don't sign up to do a damn dungeon.

Lastly, at the activity finder itself, this poor piece of crap excuse for a game feature needs to be scrapped and redone entirely. You can't exclude specific dungeons, you can't specify the group composition you want, you can't set minimum cp requirements, you can't even specify that you only want to group with people using mics. It's trash.