Well, the problem is that you run into problems if you do or you do not.

Of course people want to stop and punish thieves... and so a blacklist.
However, such a thing always ends up with some wrong people on the list
and if too many are accidentally put on there, then the coin/token may be deemed too uncertain to work.

Imagine having 0.1 tainted coin sent to your address and then you address being locked.

So, inevitably any coin/token/smart contract will kill itself by creating a blacklist.

However, the opposite is sorta true too.
Too many shady deals and people lose respect for the coin/token. (however, i have seen this just ignored and lived with: such as The US dollar)