I somehow thought that it is in the range of a few k satoshis, so more like a symbolic amount, but not 0.0011BTC. So high enough to stop abusers but not too high in order not to deter people from bitcointalk. And those are the numbers of users that paid the fee when BTC was much lower. If there was no evil fee reduction in the meantime, that would mean that someone would have to pay almost 40 USD to remove that thing. In that case, percentage can be only lower.
It's capped at the price of the copper membership which is currently 0.0006BTC.
One more question: when you pay the evil IP fee, does this resets "evil" back to zero so IP is clean from that moment?
No. It only unblocks the account. Units of evil decrease with time.