Marty seems to be unreliable and produce a lot of false alarms. At some point crying wolf won't be taken seriously anymore and Marty's warnings will be ignored.

Marty seems to be unreliable and produce a lot of false alarms. At some point crying wolf won't be taken seriously anymore and Marty's warnings will be ignored. An alternative to this is to hire a person to babysit Marty, follow him around the store and whenever there's a real spill to clean it up for him. /s