The recent controversy surrounding Liverpool forward Luis Suarez and his bite on Chelsea defender Branislav Ivanovic has left the Uruguayan striker facing months of inactivity, as the FA handed down a hefty 10-match ban in his direction.
Biting and spitting, in particular, are offences that tend to rile observers more than most. They are deliberate acts, normally committed away from the ball and are almost seen as sub-human behaviour.
What they are not, though, is among the worst offences that can be committed on a football field, and, for that reason, many will feel that Suarez has been harshly dealt with.
The next fifteen slides, though, will take a look at some of the incidents (predominantly from recent years) that rank among the worst to be committed on a football pitch.