This sounds like blasphemy, I will not entertain it (unless you have a condition that necessitates making food more accessible to you, in which case, party on dude).
How do you eat spaghetti without a knife? Do you just pray that you don't accidentally strangle your family to death with all the rogue spaghetti tentacles flying around?
I don't eat spaghetti that much, but when I do I cut that shit up 'till it's macaroni. I've also used a spoon or just a fork and managed, but with a lot of sauce that's less convenient to me.
Fork and knife/spoon - use the fork to spin and the other to cut off the pasta. This allows you to get a decent-sized mouthful without looking like these 4.
Also chopsticks. I could never but a friend I used to talk to swore by it.
I hate long noodles and will ALWAYS cut them up with a knife and eat them with a spoon. Needless to say I don't have and spaghetti at home because fuck spaghetti.
I was once taught that you can easily cut spaghetti using a cup turned on its head. It honestly works great if you don't mind the cup being a bit messy!