If you take any means of soaking unwilling victims or damaging others property to Le Mans, you need to be prepared to get filled-in, in the name of a few laughs.
I find this sh*t really, really un-funny and as a result anyone who unleashes on my associates (and me in particular - unless they're much bigger than me) get's slotted. I'm no hard-case, but having some w**k*r drenching the inside of my car kind of tips me over the edge.
It's a subject we've covered extensively - and I think the general consensus is that if you unload on someone who's not a willing participant, you shouldn't be at all surprised if you get straight-armed.
Leave the super-soakers at home with the kids already.