bonvivant you are not being unreasonable. I was shocked by this story as well.
To those posters who have said that the people who took food from the bin are squatters and trespassers, I would like to point out that they are not being prosecuted for squatting or trespassing, so I don't think this is relevant.
In fact the CPS seemed to have struggled to find a law that applies to the situation at all. The food was taken from the men and returned to Iceland (who presumably threw it away again!) and the men were held for 19 hours before being released. They are now being prosecuted under the 1824 Vagrancy Act (see below)
^Persons committing certain offences to be deemed rogues and vagabonds.
...every person being found in or upon any dwelling house, warehouse, coach-house, stable, or outhouse, or in any inclosed yard, garden, or area, for any unlawful purpose..being subsequently convicted of the offence for which he or she shall have been so apprehended; shall be deemed a rogue and vagabond…it shall be lawful for any justice of the peace to commit such offender (being thereof convicted before him by the confession of such offender, or by the evidence on oath of one or more credible witness or witnesses,) to the house of correction, . . . for any time not exceeding three calendar months^
which rather smacks of desperation to me.
If the unlawful purpose is alleged theft of the food then it would be a defence for the men to say that it was their honest belief that they would have Iceland's consent if they knew of the circumstances.