How about "Sorry, I don't give out patches. I'm too much of an asshole to offer anyone help with a recording"
That makes sense to me. Why lie? Tell em you're neurotic about your stuff and to go away if you don't want patchers.
I ALWAYS hook up a patcher if I can. I met one of my best friends patching out of him when the long line of decks i was hooked into had a bad connection somewhere and I was only getting left channel into the analog D3 I had. He grabbed my cord and plugged me in to his shit and I got a stellar tape and a good friend.
I'd be stoked to have a HEAP of decks hooked into my mics. Make tape, party, socialize. Don't lose focus.
MiniDiscos are going to be enjoyed just as much as cassettes and all the other crap we all got.