IF it was that bad then there are two things you can do to try to stop this behaviour:
1. Blacklist them.
2. Report them for 'Harassment' via the Support Desk.
The first one is easiest and best for things that aren't too bad, just that you can't be bothered to deal with them.
The second one is if you actually want SE to deal with this behaviour to make the game a nicer environment overall.
I'd suggest only using the second if it is completely out of hand and resorts to racism, xenophobia, homophobia or personal attacks that go beyond reason as put downs.
It doesn't matter if someone is running it for the 1000th time. They are breaking the ToS and it is your choice on how you wish it to be dealt with. You have in-game ways to deal with this issue. Posting here will not solve the issue as you need to report individuals. The entire community isn't like this, it just so happens that you've got the few bad eggs.