Actually, filing duplicates is a good thing. They will get tracked and appropriately linked together. Not only will the number of duplicates act as a proxy for "votes" for an issue, but the varying descriptions in the duplicates may be useful for engineering to properly diagnose the issue.
Different people will word issues differently, leading to multiple tickets for the same issue.
The way crbug works is much better, you can see everyone else's issues (minus security ones I suspect) and track their status