I've never had the problem with people touching my bikes, at least that I know of. If someone scratched my Davidson tandem, I'd probably be homicidal, but with the Burley I'd be much less concerned. For me, it largely depends on the bike I suppose, but my vote is still "yes" because it is nonetheless inappropriate to mess with someone's stuff. When I'm done building my Hercules Kestrel, ain't nobody touchin' that baby!