I would have turned him off.
Same here.
If someone assumes they can use my gear, well, sorry.
Because if you blow up my gear, I'm screwed. Not you.
I don't care if Marcus Miller walked in. I work hard and buy my own stuff.
If I know you and have a personal relationship with you (my friend) then sure.
But if you're someone who I don't know. Sorry.
Now, the flip side to this is I wouldn't expect or assume to use any other bassists gear ahead of time.
I pretty much always bring my amp (it's a micro amp so it's small as hell anyway) so all I need is a cab.
And if no cab is available, then monitors it is.
I would totally respect if another guy says no to me using their gear.
Don't ever ask a question to where one of the possible answers could be something you don't like.
It's a 50/50 shot that you may get the answer you didn't want.
I was at a show to see my buddy play a while back. The bass player in the opening band (inde rock) was good, real good actually, but POUNDING away on his bass. He broke a string.
Turned around and asked Ryan "Dude, quick lemme borrow your bass!!".
Ryan said, and I qoute "Are you effin' crazy?!?! I'm not letting you beat my bass like you did to yours!" (Ryan has a nice Sandburg).
One of the other bass players thought he was being an arse (Ryan) and handed over his Jazz (laid into us for not just handing over a bass). And we proceeded to stand there and watch that nice Jazz get pounded on for another 15 min.
Suffice to say, the guy who handed over his bass ripped the bass player a MAJOR new ass.
The other player.....was like, yeah, whatever, it's just a bass relax.
Maybe my rig. Maybe. But don't plan on it.
My bass.......umm.....no.