Realized there would be a complication with DNN when there'd be a desire to lower the min fee rate from 5 vByte to something lower, and doing so will cause headaches to fix.

Simple solution:

Min fee rate rule should be change from 5 to 1 sat vByte and shouldn't be changed.

Result:

No need to change this rule anymore, lower cost to entry (but also lower cost spam but still relatively costly).

No more headaches. Win-win.

(Also I've begun working on that username password v2 =3)