
Pilferer
Context Importance
Understand the setting where 'pilferer' is used, typically involving petty theft, not violent or grand thefts. 
Not Professional
'Pilferer' often implies an amateur or opportunistic thief, not a skilled or professional one. 
Negative Connotation
Using 'pilferer' suggests a moral judgement, framing the person negatively as a petty thief. 