"I found a bug but I don't want people to know about it! Because it will ruin the game!"
Uh ... the more people that report a bug, with the more details provided about the bug, the easier it is for the company to fix.
Also, its hard for them to know if its an isolated bug, or if a lot of people are experiencing it. There could be 300 people who have discovered this bug, but they all think its an isolated thing.
Bug are reported so they can be fixed. Like the infinite damage loop issue that they patched out. Someone talked about it, and the company fixed it.
Unless bugs are openly reported and data is gathered, they'll never be fixed.
