Vandals have scribbled vulgar graffitti against hunters on a section of the historic Victoria Lines near Gharghur.
The Federation for Hunting and Conservation - Malta (FKNK) said the incident was noted last Wednesday.
It described it as "a vile attempt to undermine Maltese culture and in particular legal and traditional hunting and trapping in Malta and Gozo".
The federation said that as from yesterday it started organising outings in the countryside by "action teams" whose purpose is "the protection of all that is Maltese in terms of both the socio-cultural Maltese traditions that we have inherited from our ancestors as well as Maltese property from anyone".