Can a cheap switch damage an expensive one?

I was at a lan party the other day and the main host guy discovered i was using my own switch on the second night. He got annoyed and told me that it could kill or damage the big switch it was connected to.

I was just wondering if this is possible because it sounds a bit far fetched to me.
Also what are the real problems of adding a non managed switch to a managed network?

Oh and in case your wondering why I used my own switch its because I didn't have a long enough network cable to reach the main one.

So they can't manage my switch
but it wouldn't really be their problem if i'm getting congestion or if I'm not firewalled would it?
I'm assuming my switch just acts the same as another computer on the network but I'd like to know if I'm wrong.
Perhaps I should have got my friend to bridge his two NICs and run a crossover from mine to his. But I still have no idea why this might be a better option if it is a better option.

oh woops. No the switch was just used to connect me and my friends computer to the backbone switch (cat 6 cable and 5 port gb switch).

Yea i just threw congestion and firewall in there because i think a managed switch is just a normal switch with extra functionality mainly to avoid congestion and to add security or privacy.

ty for answering my primary question but i came up with more oh btw i'm not accepting the fact that the switch is not manageable as a problem unless it can cause problems being unmanaged.

sorry for the confusion