The 17th century Praxis Grammatica warns against dirty fighting:
[ 511 ] Convicium convicio regere est lutum luto purgare. [English Translation]
Praxis Grammatica gives great examples of Latin sentences in the guise of wondrously useful advice. Please feel free to post your interpretation of this bit of Latin and when it would be used.

Comments
“Trying to deal with violence through violence is like trying to wash mud off with more mud.”
Could be a snappy Latin comeback to someone who says “si vis pacem para bellum”.
Much better!