AFAIK, there are two types of Evil Points, one is associated with your IP address (that used to create the account,) and other for your account.
Evil Points associated with your IP address diminish over time unlike the Account Points.
So when an account is banned, those points are added to the IP address and changed over time unless you are included in the whitelist.
As for the account points, they remain permanent.
I also think that small amounts add to IP subnet
Here are some stats:
Evil | % new users |
0 | 53 |
0-1 | 35 |
1-10 | 4.4 |
10-20 | 0.80 |
20-50 | 2.2 |
50-100 | 1.3 |
100+ | 2.9 |
Currently each unit of evil requires a payment of 4023 satoshi. You only need to pay something if you have 1 or more, though.