It would sure suck majorly if I wasn't able to kick bots I ended up getting in a party with a couple months ago in the expert roulette. Had two DPS who would auto follow me, take 10 seconds to start attacking when anything was pulled. Sure glad I didn't give them easy weekly/items and a carry while they weren't even at their computers!

With chat abuse, blacklisting people doesn't actually stop anything from happening. I got into a dungeon with someone on my blacklist a good while back, they were still trying to start crap with the other people in the party, because I was friends with them. Sure glad my friends didn't have to put up with a full dungeon of that turd nugget!

I've gotten into an 8 man roulette (Alexander 12) with a conjurer that was using a bot program to type weird timestamps in the party chat. Glad everyone agreed just to have me solo heal it and we waited to boot the bot!

With anything that 'can' be abused, there's many people who don't abuse it. It all comes down to the people you run into, with some thinking to just boot someone to not have any issues crop up for them.