Gone are the days when this could happen -
Yob 1: Hello there, Randall! I'm popping down to the library to renew 'War and Peace', would you look after my firearm for me? They didn't like it when I had it last time.
Tob 2: By jove, Merlin! Did they throw you out?
Yob 1: Out on my ear! I wasn't even allowed to take out the compendium of Byron poems that I had been thumbing through.
Yob 2: Not to worry, old chap. You can borrow mine.
Yob 1: Ah, tremendous! Anyway, where was I?
Yob 2: Your firearm...
Yob 1: Ah yes! Would you mind taking care of it? I'll do the same for you next time you go rowing.
Yob 2: Sure thing old man. Have it wrapped and sent to the summerhouse. Toodle-oo!
Firstly, yobs these days are far less eloquent than the famously well read yobs of yore and secondly, that would now be illegal.
Everything's illegal nowadays.