I never heard about DIMCOIN and my friends doesn't know it too so i think it is more likely a scam because there is no huge number of people who knows DIMCOIN and if that coin is a legit one then it is already discussed in different groups because ICOs craze right now is the new trend.
A lot of people know about DIMCOIN, maybe you haven't been reading a lot lately, and one thing for sure, it's getting bigger and bigger each day. One more, the fact that you never heard of it doesn't make it a scam. Do your own research about it, that one research might benefit you in the near future.
Although we can't call it scam from now since theirs no proper evidence that can expose their bad agenda but if theirs people doubting for that project I think much better if they will just stay away and stop reading their thread so that they will not here anything from that project. And your right people need to do some valid research so that they can have an idea for themselves if they really want to invest on that coin.