Both online as well as offline I see the same thing happening a lot: people ask for more regulation. They volunteer to sacrifice their freedom bit by bit.
You're hiding the other half of the truth. These 1xbit-ers have already sacrificed a part of your freedom with the uncontrolled spamming. As for the online & offline life, they are non-analogous situations. Those weirdos have nothing to lose by creating alt-accounts, but their statements' significance remains the same. In real life, there's not such advantage.
We should apply bans, for the sake of the community. The conditions of when it's worth to be applied is another thing to discuss.
Banning one scammer while leaving the others unaffected would not address the problem; rather, it will exacerbate it, and what is the point of the DT system if scammers are banned by the moderators?
I address to ban because of spamming, not scamming. But, don't turn a blind eye. It's advisable to mention that the service they're advertising isn't known for being legit.