I would completely advise against going further than 90 degrees as this will put extreme strain on the knees and although you may not feel it at the time, over time you will slowly wear down the joints which will lead to issues in the future.
Evidence wise - well i think if you search on the internet you will find arguments for both sides - some saying it is a myth and others swearing by it wearing the joints down...
so really the best answer is your won opinion of how it feels for you. The gain for going further than 90degrees is little and if you wanted to push your hamstrings or other muscle groups there are plenty of alternative exercises available to achieve this.