I'd have to agree with some of the above comments, it was you that made the mistake in the first place, not the other way round, if I came back and found someone had locked my bike to theirs i would be really cross but also cautious as to why they have done it. There are many stories of this happening only to return later when quiet/dark and then 'snip' and off they go. Sounds like this chap was just protecting his bike.... however, i think one of you should have left a note, my girlfriend left hers unlocked the other day, some nice chap locked his to hers and left a note, sje locked hers to a railing and the chap came down an hour later and unlocked his from hers.... some people are honestly out to help!
I'd have to agree with some of the above comments, it was you that made the mistake in the first place, not the other way round, if I came back and found someone had locked my bike to theirs i would be really cross but also cautious as to why they have done it. There are many stories of this happening only to return later when quiet/dark and then 'snip' and off they go. Sounds like this chap was just protecting his bike.... however, i think one of you should have left a note, my girlfriend left hers unlocked the other day, some nice chap locked his to hers and left a note, sje locked hers to a railing and the chap came down an hour later and unlocked his from hers.... some people are honestly out to help!