I also don't want to go to jail. So, yeah, I pay taxes.
One of the main problems with Bitcoin is that if the user forgets their passwords or loses their private keys than they lost all their wealth(How do you tax that?).
Additionally, by moving wealth to different addresses, using coinjoin, stealth addresses, ect... it makes life very difficult, if not impossible for accountants and auditors.
It certainly will be interesting to see how governments deal with these interesting set of problems. I think there will be a slow and gradual shift to national sales taxes and VAT instead of income taxes personally.