I used to play an online soccer manager game. One day I found out - essentially because I had copy/pasted a bit of buggy javascript into their homebrewed forum to help them spot the bug - that the forum itself would execute any javascript a user put into their posts.
Alarmed, I notified everyone I could think of. And waited. Knowing these guys were infamously non-responsive, and that this was a pretty bad issue, I then posted about it for everyone to read to raise an uproar and get their attention. Which it did. And we all waited.
Finally, I posted a small script that popped up an alert with "You've just been infected by a nasty bug", put it in a few places with "tasty" subject lines to get people to click & read it.
Oh, they fixed the bug. I also received from the non-technical Forum Moderators - real quotes, I kid you not:
-- one week forum ban for "taking advantage of a bug" because "someone had to be punished for this"
-- one week forum ban for "spamming the forum" (I had post I had a great player for sale to get clicks, then explained the security flaw instead in the post)
Users were outraged at the bug; moderators of the forum were outraged that I had caused such a PIA by causing all these popups when they were trying to browse the (insecure) forum