1. True
Yes, that's correct. Anything out of the ordinary should be treated as “suspicious,” until you can rationally evaluate the action or item.
More info:
Anything out of the ordinary should be treated as “suspicious”. This is for your safety as it may contain any hazardous or explosive materials.
Any random bags/container or any things which is left or has no owner might lead you into trouble.
You should be much much careful and suspicious towards such things. until you can rationally evaluate the action or item. Always be careful to suspicious Packages and persons.