All three of those things sound pretty plausible to me. ISIS is known to use bitcoin, and I doubt they're the only one, and the single biggest use case for bitcoin up until this year was to buy illegal drugs. Using bitcoin for illegal and nefarious purposes would surely be one of the most obvious things to do.
What's its biggest use case now? Funding ERC20 ICOs?
Appearing to is good enough. Just as it funds and underwrites altcoin hustles. Need to lure in $1MM of real money to your ICO? Pay an old school bitcoiner to move $10MM to an address you claim to control and call it organic market interest.