InvalidChars Filter - turn off logging?

i did my own simple class to remove chars and if they put a http link in the form it normally means their trying to sell something so i brush that off the a spam form and in that  case the mesage doent get sent . 

try  typing in    viagra into  contact form of this site and see what happens https://andrinaboutique.com/

Yeah I feel you and could do something similar.

I mostly turned on InvalidChars filter tho because I got someone running a tool on every input on my site using all sorts of strange characters to try and find vulnerabilities. Since I enabled this filter it's completely stopped it.

Can you share your filter for invalid chars? Maybe it's similar to the one CI provides.