I've streamed myself playing MWLL on livestream before. It got mixed reactions. Some liked it enough to buy crysis and try it themselves, although i don't think any of them still play, but others not so much because they couldn't get over the fact that MWLL =/= CBT, partly because I was driving around in an Oro murdering everything from lights to heavies (this was back in early 0.4 when tanks had ridiculous armor).
I suppose there's no such thing as bad publicity though. I've been thinking about buying a bunch of copies of Warhead next time it goes on sale for dirt cheap on steam and gifting them to random people i know.