Don't worry, we use Snake, if anyone see's, we kill them. The Nikita idea isn't to bad, but I find the mine field is a tad predictable. It's hard to do with online lag, but sticking the side of a stage and letting them wait there time out, then blowing them up and spiking them is just to **** awsome. The Mine though does make a good tool for edgeguard. I personally love to use the mortar if there going from above, then after they air dodge it, Nair them after it's done and knock them away. Also it really helps when your recovering to throw a grenade, it helps create a barrier against projectiles, can be caught by a foe rendering their attack useless, or if they just stand on the ledge, it'll force them to move letting you have an easier time to recover.
O you should of seen this one C4 moment earlier, I stuck a guy using Luigi, but he's close and we exchhange a bit, it gets stuck on me, we battle a bit more, then I use my u-tilt which transfered it to Luigi and while he was way up high, blew it up while he was fast falling
Also if you count out the grenades time (4 seconds), your able to time crazy things such as using the roll or step dodge or air dodge invicibility with a grenade in hand, causing it to explode on your opponent