You can't blame bittrex. If they don't add the coins - mintpal/polo or some other exchange would anyway.
If you are unsure of a coin - get its source code and check it.
In this instance - it seems no one did:
>> pindexBest->nHeight+1!=1
Was in the codebase plain to see.
If you want crypto to be more widely accepted, which would benefit all, there needs to be some level of responsibility for everyone involved. I'm a mathematician by trade, I don't necessarily read code well enough to understand the details. Bittrex takes part of the blame because they should know what they're doing. Long-term, this only hurts them, as it should.