The thing is, would somebody buy their coins?
Because many people don't trust them(because they are evil), then who want to store their coins?
Unfortunately there are enough fans of IS, i can ensure you even in your near surroundings.
I think it might lead to draw away suspicion from bitcoin. Though cryptocurrencies as a whole might become attackable.
I would like to differ from you in saying that something linked to Crypto currencies, would actually draw attention to Bitcoin, because it would fall in the same category. There are already voices in many countries supporting the banning of all encrypted technologies.
The positive thing about this, is that these Alt coins would not be backed by a large network and Anonymous could target them, and take them down, wherever they would be trading.